You do realize the batteries used will just fail out right when they are depleted right? There is no gradual decline. They just quit working. That is normal. 4 years of charges and use is pretty good for a battery. Be happy.
As for Apple quality, I have not had an issue with my MacBook Pro's or the like. So far I have been happy. I had a few hiccups with my 3GS and 4 in regards to crappy screens. 4S had no issues for me.
I will take a MacBook Pro over any other laptop out there - any day. Even if they were all the same price. The build quality is unmatched by anyone out there. Trust me on that. So much thought and detail went into the design of these things it's just amazing to see every time I open one up for repair (due to someone dropping it or spilling something on it). Everything is so compact. Not an ounce of space is wasted.
Now, open a competitors laptop and there's a crap ton of wasted space, plastic bits, pieces and crappy screw mounts that consistently fail (Toshiba - i'm talking about your sorry crap). So on so forth.
I'm happy I came to my senses and switched a little over a year ago. Best move I made. I was even an

hater!