I got the 250 Watt 6.5 inch bazooka and it is great for being so compact and a great turnkey option for a 200$ sub + box + amp combo. Especially how great it will fit in the area above the spare tire. It will fill in the void of the low frequencies. On some songs, it can actually sound quite good.
However, in all honesty that is all it will do. It will not "bump" like a normal sub, but I've heard the bose system and I'd say it definitely hits harder than the stock bose sub. So for those that don't want anything loud enough to shake the car, but still a healthy amount of bass compared to the base system, it is a great choice.
I'm selling mine btw if you're interested
. (Bazooka BTA6250D) Here's a pic of it. Since this pic it has actually been readjusted, and the cone is now facing towards the driver's side (better fitment).