After a few days of programming my MC3000 and charging some NiMH and Li-ion cells, I can report that this charger truly lives up to its reputation as the ultimate cylindrical cell charger. Using the Advanced Mode gives you control over almost every imaginable aspect of charging, and you can set quite a few safety features according to your needs and the cells you use.
It is also certainly true that it takes some time to read the instruction manual and the various online forum threads related to this charger, but doing the reading is necessary to be able to use the charger safely and effectively, and get the most out of it. I think some of the instructions in the manual could be a bit more clearly explained, but the one question I had after doing all the reading and experimenting with the settings was answered by the helpful members of the Budget Light Forum.
The hardware and firmware challenges experienced by earlier units have been adequately addressed by updates, it seems. Everything works well. The battery holder sliders seem solid and make easy contact with my flat-top, unprotected Li-ion cells. The default time cutoffs have been eliminated from the firmware, also.
I definitely made the right decision in buying my MC3000 from ProgressiveRC. They offered free shipping, and also offer warranty service in the event there are any problems during the warranty period. The charger arrived on the east coast within just a few days. I'm grateful that the product was boxed for shipping. In this day and age, it is unusual to find a company I feel I can trust to do a good job and provide superior products for a competitive price.