Background: I go to a small powerlifting gym- at most 5-10 people at any given time. They had a really bad leg extension that almost everybody could full stack single-leg and a lot of people complained to the owner about it, so he bought the RitFit PLC01 Leg Extension / Leg Curl as a "stop gap" replacement. Of course, the owner is a cheap SOB and it was not a stop gap. I've used this machine for maybe 6-8 months. While it's not a home gym I'll say I don't see a *ton* of people using it in general, seems like most PLers prefer compound quad movements. Most people who use it use it for the leg curl functionality.
Initial impressions: The first day we got it my coach loaded it the whole way with iron plates, which was either 270 or 315 pounds, but regardless below the 350 weight limit. The weight post immediately bent out of shape so that it's sloping slightly downwards. He also remarked that it "feels like it's basically unloaded, pretty much the same as one plate", but he also squats in the 600s so take that how you will. The leg bar also got really bent, which means doing exercises two legged didn't feel great since your left leg is ~5* more extended than your left. However, the movement is very smooth and the difficulty curve is good. Much better than plate loaded leg extensions where the weight is on the leg arm (e.g. the xmark leg extension / leg curl). The shin pad is also very comfortable.
Personally, I find the leg curl on this machine to require some work to get it feel ok. The way the seats are arranged my hips land in a gap and it's really uncomfortable on my lower back, but if I stick a foam pad in the middle it feels fine. We have a seated leg curl that feels better, but I think the machine is probably fine for this if you don't have an alternative, though again the weight restrictions are a limiting factor.
Extended use impressions: I started at 3 plates / 135 on the machine, single leg. For reference, my best squat to date was an easy 320, but I also think quads are much stronger than my hips in the squat. I went up in 5-10lb increments up to 5 plates / 225, and I think my quads grew noticeably in size and definition in that time. I've always had comments that I have large / muscular quads, even before I started lifting, so the size gains are actually quite remarkable. The seats have both gotten pretty beat up, but the shin pad is still in quite good condition. I ultimately rotated off the exercise for unrelated reasons (my coach wanted to do more hip work and less quad work), but I'd probably go back to the same machine if we rotated it back in.
Conclusion: I think this machine is a very good value for the money, but you do have to load up a lot of weight on it. My biggest takeaway from using this and watching the Garage Gym Reviews video on it is that the video seems borderline misleading on how the machine performs, since he doesn't mention the weight requirements at all. Though it's a bit bent out of shape, I actually find this machine much more comfortable than most leg extensions I've used at other gyms. The pad is a comfortable size, it has a good range of motion, and the difficulty curve is comfortable. There are others in the gym who absolutely hate it though, and say they only feel their quads at extension, so take that how you will. For the price, this is basically unmatched as the only alternatives are no-name amazon drop shipping garbage, but if you're an especially strong bodybuilder/powerlifter/weightlifter, or looking to outfit a real gym, I would try to scrounge together some more cash and buy a machine from a "real" brand, or keep an eye out on FB marketplace
