I have them. Payed $118 with shipping on ebay. Too cheap to not give it a try, so I did. Here is a full review. Maybe it will help others later as well.
As mentioned they are Chinese and have different brand names. Arashi, mad moto, Area22, Hotbodies etc.
The short; If you expect to just put them on and go ride, look elsewhere. They need some issues taken care of, but when that is done they work good and for the price they are great. I would buy them again and use the saved cash for other parts.
All is from my 07 point of view.
-They allow for adjustment up/down and back+up/down from stock. Also adjustuble peg to shift/brake lever pin distance.
-Pegs are a little shorter than stock. Not a problem though. They have ok to good grip, but less on the edge. Better than stock.
-They do flex a little when I stand on them and rock. (about 215 in gear) For my weight it`s not so much it worries me what so ever.
Hell, even the stock ones flex, even though a little less than these. Some of the other expensive brands flex as well.
-Shifting is precise with the bearings. Much better than stock.
-They come with a return spring for the brake and allows you to mount the brake light switch. Both great features not found on all aftermarket ones.
-Machining is very good. Boltholes lines up perfectly. They have a solid feel and weight, but it is of course not possible for me to verify if it really is t6 6061 alloy, or the consistency of the production quality.
-I have used mine for about 2500 miles now. The anodizing is still like new. No wear marks from the boots what so ever.
-I personally think they look really good.
-Replace all 10 load bearing bolts. The ones supplied are low quality. They are also a hair smaller in diameter than the good quality replacement i bought. If using the supplied ones, the thread fitment is looser than it should be. This is probably why it`s common to read that bolts loosen etc on chinese rearsets even when using threadlock. And I don`t trust them for strength either. For the peg bolts buy them longer than the supplied ones. The pegs got more thread and room. Measure.
-Take apart everything and use blue threadlock. No issues with bolts coming loose at all with mine.
-Bearings are low quality. Don`t know how long they`ll last. But they still work as they should for now. Can be replaced later if needed.
-There is a spacer between the peg and the bearing. As they use the same pivot/axle the spacer must only touch the inner bearing race. But the spacer lip is a little too low and causes some drag on the outer race/shifter/brake when you tighten the peg. I used a 0.3mm or so shim in between the inner race and the spacer lip. The rearsets with a separate mounting point for the peg and shifter/brake is a superior design. But still, this works well enough.
-The mounting position for the MC is more forward tilted. My stock brake line was a hair too short. I made a small extending plate (like 3mm x 5mm x 8mm) to rotate the MC mounting position back a little. It is hidden behind the heal guard. When I get new lines I will order a little longer for the rear.
-I had to extend the wires for the brake light switch to reach the mounting point.
-They need about 4mm of washers between the frame and the mounting bracket to bring them out to the correct position/line
-The lower mounting point for the exhaust heat shield is lost. But it is still securely in place without. On other gens this will be different.
-No spareparts available. Well, maybe you can get it from Hotbodies or area22.
Thats about it.