I was initially surprised at the quality of this for being so cheap. I have purchased a few amazon basic items and have been happy with all of them. This headed seat cover is no different. instructions are a bit straightforward. it has an elastic band on the back to keep itself 'roughly' in the right spot. Instructions say you can leave it like that or use the additional tie down straps ( that also come with hooks). Straps are fine but are extremely short, so as most other reviewers have mentioned, have to use something like string or bungee cords to lock down if you really want it not to slide around. I have this over a leather seat which gets extremely cold in the winter, but it slides like its on ice if its not bungee corded down to the seat. Install was a joke, five minutes? maybe? Hardest part is deciding how you want to anchor it. Low heat works fine, its nice but has to be on for quite a while before its 'comfortably' warm. However you can feel heat after about one minute after you turn it on. High heat works really nice, extremely warm, I prefer this one, unless I am on a drive longer than 30 minutes, then switch it to low or just off because my car is really warm by then. Do heed the warnings, and unplug it while not using. It has a nifty red light on the plugin so you can see if you left it on/plugged in. The seat in my vehicle has side airbag, and 1 armrest(on the opposite side of the airbag) and i was able to fit this without modification to the seat as to not interfere with either one. So after all is said and done, I am extremely happy with my purchase. Does exactly what it is suppose to do and was a very reasonable(cheap) fix for my cold bum! Would definitely buy again.Edit on 2-1-14I bought this and it was delivered on 10-31-13 and as of today(2-1-14) it no longer puts out heat. checked the fuses and tried and multiple 12-volt plug ins and it will not work. I will probably opt for the professionally installed heated pads next time since it couldn't even last one season. rating downgrade from 5 to 3 stars as at least the price wasn't wallet shattering.