Hi! My first post here. I got my Retina Mac Book Pro with 2.3 GHz and Nvidia 750M about a week ago. Up until now I've been working on an iMac but now I needed some more mobility so I decided to buy a RMBP instead. I have two questions for you all. 1) Should I add the apple care? I haven't yet since I thought it too expensive, but I think I can still add it if I want to. I think it comes down to whether heavy use means there's a fairly big risk the computer will be worn out within the three years? I plan to do 3D rendering in the background while I do my regular work and sometimes when I'm AFK. I've read some places that a high end RMBP can be expected to last 6 years, but does that apply even if I make the computer work hard? 2) The 3D software I use allows for both CPU and GPU rendering. I had expected the GPU rendering to be much faster but so far I've been disappointed, with render times that sometimes were more than twice as slow with GPU (CUDA installed) than CPU. Is this to be expected or have I missed something? I'm quite impressed with the CPU performance though when I compare it with my iMac (which has 3,06 GHz Intel Core Duo) so I'm not altogether disappointed, but I'm wondering whether the 750M was wasted money? Looking forward to your answers.