I own two of them. I've had the cheapest model, the thin barrel in a tupperware stock for a couple years now. It has the regular trigger, and using a simple walkthrough on rimfirecentral.net I was able to lighten it up significantly. Its fun, but its too small for me. Feels like a toy. My wife shoots it now, she really loves it.
I find it to be incredibly accurate, for its price, once the trigger had been smoothed out. It does, however, suffer from the poor extraction problem. I never bothered to have it fixed.
I also have a heavy barrelled version in the wood stock with the AccuTrigger. It looks nicer, feels bigger to me, and I enjoy the AccuTrigger which I haven't changed even bothered to adjust at all, yet.