Took my mac mini in to speed it up as only 2G memory on Sierra. Quoted $160 for 16G. Computer Doctor BG did the work and took it home. However, didn't fire up. Took it back and quoted $100 to fix. What was I to do as it didn't work? Picked it up and tried it out before taking home. Computer was slow to load and said the only way to speed that up was to get a Solid State Drive. However, this was never mentioned. They ended up not charging me the extra $100 for all the hassle. Made me happy. Took the mini home and it is a little slow to load but once logged in, it is very fast and night and day difference. Would go back if any other issues. Plus, they are open on the weekends.