I just bought a used SE3. I read a bunch of reviews that said that it worked just fine, so long as you bought prewound NEB bobbins, because the bobbin winder built in just didn't do well for most people. So, I bought a bunch of prewound bobbins, and it works great.
I'm waiting on my software EM2, embird, and Vikant Ultimate Box. I hope I chose wisely.
Here's one of the first things I made:
This is a PUL (laminated waterproof knit) diaper. I used Sulky's heavy tearaway backing, and a ball point needle.