I have the Brother PE770. I only do machine embroidery occasionally, so it suits me fine. I've never used/had another embroidery machine so not sure how it stacks up, but seems easy enough to use. So far all of the problems I've had have been user error (wrong fabric for the design, wrong stabilizer...etc.)
The only gripe I have about it is the screen. It's a tiny little monochromatic screen, and it's nearly impossible to tell what design it's showing you. I "solve" that by keeping my designs on my PC and only putting the few designs I'm going to immediately be using on my thumb drive. That way I'm not trying to browse though a bunch of designs on that tiny screen.