I bought a 13 inch MBP a few months ago. So far, it seems great. Screen is amazing (although dim in bright sunlight), and I haven't had any issues with memory

I bought a 13 inch MBP a few months ago. So far, it seems great. Screen is amazing (although dim in bright sunlight), and I haven't had any issues with memory (right now, with 3 web browsers and a text editor open, I am using 5gb out of the 8gb total). The processor is very fast, although the integrated graphics card is slow (whether this matters or not depends on what you are doing... I wouldn't buy this if you want to play complex video games or do a lot of graphics work). The screen is big enough to run two windows side-by-side, a long as they don't have too many toolbars. The one downside is the OS. Yosemite is extremely buggy. Drops wifi connections, hangs when logging out, etc. El Capitan is being released next week though - hopefully that will be better. Whether or not you need more RAM and a faster processor really depends on what exactly you want to do with it. For me (text editor, multiple web browsers, terminal, MAMP, all running at the same time) it is fast and large enough.