Filling and bleeding the first time isn't too hard.... but the second time's a killer. I could never get all of the liquid out of my loop, so when i went to fill it trapped a bunch of air, enough so that the pump wouldn't work correctly. I ended up getting a bay res instead, it worked a whole lot better, no bleeding involved. The one I have has a few issues, but with that new one Swiftech put out it should do a real fine job, I'm thinking of buying one myself. Plus with a res mounted high in the system, you can use gravity to fill your loop, rather than having to suck at it and possibly end up with a mouth full of antifreeze (Like me, haha).