Review (3/5): Good...IF
This is a potentially excellent product--IF you don't need it to be completely stable. It wiggles some, though if you put your weight directly over the leg and push straight up, it's fine. Just don't expect it to be rock solid. I have a regular grab bar on the right side and use the left support rail only--and that's fine because the two rails are not directly connected so you can use one rail or both. But as a big guy (230 lbs), I'd be nervous if I didn't have the grab bar even though it's rated for 300 lbs. it would be perfect for a smaller person who just needs a boost, but it could be potentially dangerous if a larger person with serious balance problems fell sideways.
Note, too, that this will NOT work with a 1-piece toilet that curves upward from seat to tank. The connector piece needs about 2 inches of flat space behind the seat.
Pros: Sturdy aluminum tube construction; designed to bear weight directly over the support; easy to put together with a screwdriver and maybe a pliers (depending on your toilet seat hardware); adjustable for height and width.
Cons: Works only with a traditional toilet; "wiggles" to the left and right; adjusting width and height might be difficult or impossible for a person with poor hand strength (the spring loaded buttons are stiff); made in China (but what isn't these days).