“SERVICE!!! OWC goes out of there way to show that companies still care!! I haven't been so satisfied with a company in the technology industry before. They have promptly answered all of my questions. Gave detailed answers and never made me feel like I was asking an "inferior" question. PRODUCT!!! I purchased both the Mercury Electra 3G Internal & The Mercury Elite Pro External and I have been able to run 5 Operating systems while developing on each via MacBook Pro. The Products are sturdy, and are made of quality parts. This is a HOMERUN!! Keep up the work guys!!