There are a ton of people who hate the Blue Tops most claiming that they didn't last. If you do some searching you'll see most of these people didn't know what they were doing with the batteries and didn't have a decent charger designed for the technology.
I'm going on season 4 with mine, no issues. I like them due to the no spill design and ability to mount them just about anywhere. I also like the battery trays that are available and their compact design. They do cost more and if you're in love with your 20 year old or cheap battery charger they are not for you.
As for Interstate and Diehard.... had nothing but good luck with both. They're cheap but you will most likely have to live with the large black plastic boxes and deal with the battery acid that tends to somehow always make it's way out of the battery. They are however a very cost effective solution.