I use this for one thing and one thing only. I love the sub bass sounds it oozes out of its pores. As far 303 type sounds it is OK, but I would apt to use the a more lively velocity triggered filter sound like in the scorpion, or attack. But like I said for that smooth, ultra low bass this is the thing. I use it alot. I've never had to use there customer support, but I assume it is good.