I had previously had terrible luck with their batteries. That changed for me when they stopped making them removable (thankfully!) For the removable batteries

I had previously had terrible luck with their batteries. That changed for me when they stopped making them removable (thankfully!) For the removable batteries in my 2005 or 2006 Apple said they had a lifetime of 200 cycles (mine never reached that). My current MBP is supposed to have a lifetime of 1000 cycles. I'm a few hundred in and have high 80 or low 90 % capacity. It might not meet their expectation, but quite a bit better for my needs.