My lee perfect has been a great little unit. very uniform. So consistent, in fact, that as a newb I found myself constantly worrying if my scale was defective - it measured so repeatedly. Too much reading on the forums about charge variations, and wondering what was wrong that I wasn't seeing any...
Yes, mine did leak a bit (with 231) at first, so I took it apart and figured out how it worked. Took a little grinding compound to it to make the surfaces mate better, and sanded a washer down at an angle and put it under handle plate and now it's nearly leak free.
like others have said, for $20 you can't really go wrong can you. even if I had not fixed it at all I think it would have taken a lifetime to leak $40 worth of powder.