I use them defensively and toss them over walls.
...It's funny. I remember posts during the Testfire saying that Burst Bombs were useless and Splat Bombs and Suction Bombs were superior in every way. People were bashing the Splattershot for having BBs. Now look at how appreciated the BBs have become. As for myself, being a bomb user, I actually didn't care much for them during that time. I was all Charger then and even during the first week. It wasn't until I unlocked the E-Liter that I started loving Burst Bombs.
People were also crying for the charger to be buffed. I've heard some people say that there was less lag during the testfire. I don't really remember since I only played 30 minutes total. Did anyone else find this to be true?