Meg, I haven't heard anymore about bad cuts. I have figured out my machine, too, though. I LOVE it! Above are a lot of good tips to avoid anymore bad cuts, but here's a list:
1. It only holds a charge for an hour. If you unplug it, you have an hour before it starts to cut wonky. I keep mine plugged in. Even at crops.
2. Home the blade.
3. If it's going through the motions of cutting, but not doing anything, tighten the blade all the way, and then try it.
4. The calibration card did wonders for my cuts. I've only had to do it once, and it cuts great.
If you loved working everything about your Slice except the wonky cuts before, you'll love it now. Some just prefer the way the Cricut works, etc. I prefer using my Slice.
Good luck making your decision.
Erin in Okc