I have one. It's good, but a bit bulky, and the UI could be better.

I doubt mine will ever pay for itself as it is quite expensive and I don't throw away many rechargeable batteries. I wanted a fancy one anyway.

The mass market chargers emphasis speed, and so tend to high charge currents which let the batteries get hot, which is bad. The high-end ones tend to have lots of features and be expensive. I don't know if there's anything in the middle, that's cheap and basic but doesn't hurt the batteries. Ideally it would have independent channels and terminate based on voltage rather than a timer, but you don't really need LCD displays, the ability to set charge current etc, or a lot of the other bells and whistles unless you just like gadgets.