I got to play a used one in GC recently (but didn't buy that one as it was priced too high) and I was pretty much sold on it being the practice amp I was looking for. I didn't believe any of the hype I read or heard during its long launch period, but after hearing it first hand (the most important aspect to me) I felt it was worth the plunge. I needed something portable that I could take on road trips with the guitar and be able to play quietly without disturbing anyone with or without headphones. It certainly gets loud, but overall, it sounds really good a low volumes. I think this is partially due to the "excessive" low end that is often derided in reviews. I've only had it a few days with minimal time to play it, but glad I got it. Most practice amps I have tried sound anemic to me, especially at low volumes and obviously tube amps like to cook and peel the paint when they are happiest. This sounds plenty good to practice with, without being excessively loud, and I find it warm and musically inpiring. I think thats a combination of the low-end and the stereo speakers creating a huge sound image that is really nice at low volumes. I also like that I can connect it to the laptop and record an idea without any excessive setup. I haven't tried it with logic yet, but I don't think there will be any issues. As for the drum and basslines, haven't tried them, but I suspect they are good enough to have background fill to play with. If they are in tune and can keep time, I think thats a win. We'll see as time goes on, but for $300 new (amp and bag), its hard to complain on any level. I have not heard anything as good, as portable and as inexpensive as this. The Yamaha THR's seem to be the ones to beat, but having tried the 10 in the past, I just wasn't thrilled. Considering the 40 is $500, the Spark is a steal.