Talk to the installer, find out if he is sounds like he knows what he is doing and make your own decision. Best buy will warrant the install for the lifetime you own the vehicle, will random dude driving down from wherever the **** do that for you? NO
Everyone here loves to hate but i doubt anyone here has even had a single thing installed by best buy, all the do is read shit people complain about.
Let me ask you this is you had 1000+ store doing 1000+ cars a day i dont see a way you will go without a complaint.
Im honestly can care less who you pay im just sick of retards spouting off shit they have read with no prior experience.