I have Total Tech. It's worth it if you use the features that you get discounts for (or for free) or if you buy merchandise that is marked down for Total Tech members. Also the 60-day returns are helpful and two years of tech support with a dedicated line. It's not really worth it if you only shop there once in a blue moon and don't find $200 of savings that are not ordinarily available to the regular customers.
I got Total Tech last summer and saved several hundred dollars on having them install a new head unit and component speakers in my car. All of the work was free after I got Total Tech. I also bought a 65" TV about a month ago that they mounted and set up for free, normally at least a $200 service. You have to utilize the benefits you get, but if you do, the savings can be huge.
I know a lot of people give Best Buy heat but for me they've always been great. Never had an issue returning or exchanging something that wasn't to my liking or was messed up, and all the services I've had them do for me have come out really well.
Thank you.