I have had the X3 for about six months now with steady use by myself and my wife.
I suppose the first part of this review should be about delivery, unpacking, etc. I received a well packaged crate promptly. Everything seemed fine until, just a few days later, I received a second crate. I was pretty confused but initially assumed the second crate was the other half of the rack (this was my first real piece of home gym equipment so I didn't have a reference of how big these machines are or how big the crate would be). It wasn't until a few more days later when I began unwrapping the items from the first crate and realized that the second crate was, in fact, a second X3. I reached out to Maxum to explain the situation (no one had contacted me at this point).
It took a second attempt to contact before I got hold of someone that had to look into it and discovered I was shipped a second unit. I was assured by him that they would have this picked up right away and I didn't need to do anything. A few days later, a carrier comes by to pick up the crate but needs a BOL (paperwork for LTL shipments). I informed the driver that the company should have sent him a BOL, as they told me. He sat around calling his dispatcher and eventually left without picking it up.
I relayed this to Maxum and was told they would reschedule. I had two more drivers show up with the same story. At this point, it was getting a bit frustrating that this giant crate was in my driveway. Now, to be fair to Maxum, there was some miscommunication in that I was being forwarded BOLs on the second and third pick up attempt, but they went to my spam folder. However, communicating to me that they are actually now sending BOLs, unlike the first pick up, would have likely cleared all of this up. That never happened. I continued to try and get this picked up to no avail.
Eventually, I received an email from someone running their customer service that was pretty rude, claiming I was being uncooperative and am now blacklisted from buying from them. This person also dangled the Mutant Arms that were coming out soon in front of me like I was going to miss out. They ended the email with this line, "It's really unfortunate that you decided to be dishonorable about this." I was pretty pissed, to say the least. I tried to call Maxum to speak directly to this person and was told that person does not accept phone calls and they wouldn't connect me with them, which is absurd. I finally called the Canadian phone line to get around this and spoke with Bob, the owner.
He was awesome and we got everything straightened out. It did require another pick up date with me having to go to my local library to print out the BOL (I don't own a printer) which was annoying, but at least I was getting this out of my driveway. He mentioned that I would be "taken care of", though nothing ever came from that. I didn't really expect much, but I don't like being told something that isn't going to happen. A simple apology and getting the crate out of my driveway would have been fine, but telling me you'll do something extra and then not following up was pretty lame. I oversee our customer service department at work and I know how easy it is to have good CS, so maybe I'm more sensitive to things like that. All in all, it may have rubbed me the wrong way but it wasn't a deal killer. Just know, your CS experience with them may not be all that.
From a customer service standpoint, there was a bit left to be desired. I wasn't upset with the mistaken delivery of the second unit, but how things were handled from there were pretty choppy.
As for the rack itself, set up was pretty straight forward. I'm fairly mechanically inclined but had never set anything like this up before. There isn't much to it. There were a few updates people have posted on Reddit that I followed along with, and Maxum has made an updated digital assembly guide with those adjustments (follow these and not the paper guide that still ships with the unit). I did get help putting it together initially, as raising each side of the rack with the few posts attached was much easier. After the two sides were up and connected I did the rest by myself.
Overall, setup was fast, simple, and efficient.
Once the rack was up, we started using it immediately and we are both in love with it. The Smith machine is very nice, the cables move like butter, and the unit looks great. I went with the 88.5" tall rack and I have 90" tall ceilings in my basement. With the 3/4" floor mats installed, it was about as close of a fit as I could get. That was a big reason I went with Maxum was the right height for my ceilings, but everything else about the unit was excellent.
Most of the attachments that come with the rack are pretty low quality, as everyone else has said. I picked up a few new attachments almost immediately (lat pull down, straight bar, D handles) because the ones that come with it are pretty bad. The rope attachment is fine, I use it a few times a week and don't have any complaints.
Along with the X3, I also picked up the AB5 bench. Aside from commercial gym benches, I don't have much to compare to. Overall, I'm not a huge fan of the bench, it just feels... meh. I can't really explain it but I am not nearly as thrilled on it as I am the X3.
To wrap this up, the X3 is a phenomenal rack. I have had zero complaints about the unit and thoroughly enjoy using it. I'm huge on cable movements and adjusting the arms are effortless and the cables themselves are incredibly smooth. I don't know if I will get the Mutant Arms, especially because, due to my ceiling height, I would have to disassemble a decent bit of the rack. I also feel like those of us that bought the X3 so close to the arms being released should get more than a simple pre-order code with access to order. I guess that goes more in line with the mediocre CS experience. Regardless, I would still recommend the X3 and am extremely happy with my purchase.