I was looking for an alternative to plastic-jug type brake bleeders. I wanted something robust. This had a lot of what I was looking for. I dont like the bladder design, so I took it apart, cut out the bladder (using it as a flange gasket) and modified the plumbing so I could pump air on top and push fluid out the bottom.
I also had to fix the cap that adapts to my master cylinder reservoir (it leaked way too much because the inside of the cap was not molded well).
I've also bought some other caps because the kit provided did not meet all of my vehicle needs.
If you take it apart, re-plumb it, and put it back together with some modified parts it works great. I just wish someone had done this right from the beginning.