I purchased one of these HF multi-use tools around Christmas, for about $80. Even given this much higher price, I'd still say that the tool was well worth it, since it does a great job of making otherwise very difficult tasks easy.
I did notice two problems with my unit, though. First, it runs very hot, and can burn wood or your hands if you're not careful. I've experienced this heat even when I don't put the unit under load, simply turning it on for a minute or two. Second, I've found that the nut holding the blade won't tighten enough to keep the blades from loosening after a few minutes of use. I don't consider this loosening to be dangerous, and it probably wouldn't damage the workpiece, but the constant re-tightening becomes quickly annoying.
Has anyone else experienced these issues, or have I purchased a defective unit?
Despite these problems, for the odd jobs that I needed the tool for (I cut through my hardwood floors to add flush hardwood thresholds between rooms), the tool worked splendidly.