This question has probably been debated to death, but I need some advice. I have a mid 2010 15" MBP with i7 dual processor and 750 gb (7200rp) hard drive, which is currently running on Snow Leopard. I would like to upgrade to Lion so my quandary is do I download from the app store ( my broadband is a mobile router) or go for the the thumb drive. I have purchased a new WD studio 2tb portable hard drive toback up to. I am moving abroad permanently in 6 weeks to live and work and my thought was that if something went wrong then I would at least have a physical copy of Lion to sought out any problems that might come up. Also how go you all rate Lion compared to Snow leopard? Any advice or input would be greatly appreciated. Thanks Jenko.