I have found my HE machine to get the clothes about as clean. Not better IMO, but not worse either. The only thing I had to get used to was, once the machine starts, the door locks-whereas with my old top loader, you could always lift the lid and toss in something. I did run my load this morning through a second rinse, as I had some yucky work stuff in there, but usually I don't need to do that.
I have never had problems with mold or stink, unless dh or the kids close the door after use-I leave it open (I would NOT do this if small children had access to the machine!!! it was always in the basement so it wasn't a safety issue for us) I've never used the washer-wash stuff.
I have NOT found myself to use more soap, or three bottles of HE to the one regular (as a PP stated)-it really works out to about the same for me. I used Tide free n clear liquid when I had the top loader, and I use Tide free n clear liquid HE now. I don't buy any more than I did before, and I use less than the label says-I have a large capacity machine but I only fill the cup to the 'regular' line and it cleans fine. I'm allergic to fabric softener so this is not something I buy.
The front loader really has saved a lot of water and it spins the clothes so well, that they take less time to dry which saves electricity for the dryer (if I can't hang them out, like in rain or winter). But I admit, it did take a while to get used to the new machine!