So first before jumping down my throat as those here so often do now a days I did run many searches on this both on MR and on the web before posting. And actually the answers I got confused me more than helped me. So I recently purchased a 17 macbook pro that has a second hard drive affixed and the CD drive removed. My plan was to replace one of the hard drives (currently two 500gb HDDs in there) with a 64 or 128GB SSD. The idea being that I would have all the programs and OS on the SSD and use the second 500gB to store the data and documents. So when I need to work on something I could drag it over and work off the SSD and drag it back. Best of both worlds without buying a massive expensive SSD. But in my research I kind of learned two things, or had two questions. One is with that set up I would do a lot of reading and writing between the disks which I read is bad for SSDs and kills the lifespan. The second is about the real world performance increase with SSDs in general. I want to know how good they really are. From what I've seen they are a lot better at startup times for sure. But also from what I've read they don't seem to have that much of an impact on programs in the real world once you've started up. Please correct me if i'm wrong. But I guess what I'm asking is if i'm just going to save 20 seconds on a startup, and 2 seconds on opening PS or saving a PS file it doesn't seem so worth the trouble you know? I just want some clear answers before I jump in. Thanks.