This is right up my alley.
I bought my starter set of Ryobi One+ about 3.5 years ago. This was the kit with the circ, recip, drill and light. Came with two NiCds.
Over the years I've added to this system significantly. Bought a set for my BIL. Bought some reconditioned tools. None have failed. No batteries have ever failed. I keep these in a workshop that has poor insulation and no power, heat or A/C. We go anywhere from 15-100F. The NiCds have been relegated to radio and fan duty, but still perform as they should.
For the price, I can't speak enough good volumes about the quality. The only issue I've ever had is that the bolts on the cordless jigsaw came loose and out, but I wasn't using the tool properly. These aren't industrial-quality tools, but does the weekender need them? I argue no. While the Ridgid offers a better battery proposition, the Ryobi is more versatile.
Including yard equipment (edger and blower), I estimate I own 15 of the tools, and I'll probably add 5-6 more. I have 1 large LiIon, 3 small LiIon and 2 of the NiCd.