Can't agree more. My Craftsman 18V nicad tools went 10 years on the original batteries but 6 months on the "Genuine" Sears replacement batteries. Dropped by HD to get something, saw the Ryobi 6 tool kit on sale and bought it. Added several other one+ tools and have been extremely happy. Even bought the 3/8" ratchet that you can't seem to get in the US.
I have the skill saw, sawzall, trim saw, angle grinder, 1/4" and 1/2" impacts, drill, string trimmer, blower (use it for small areas, got a good Husky backpack blower for the yard) ,3/8" ratchet and the fan. I mostly run the 4 AH batteries that I got a 2 for 1 deal on. They go everywhere.
That angle grinder saved my butt at Dixie Run last year.
For my use, they are great and now about 2 years old. I'm a home user though, In a commercial use case, I would go with M.