I haven't tried the thump yet. The LowPro beats out my derringer(clone) flavor wise and it doesn't leak. I've never got a flavor as intense as the LowPro with that much volume. As strong as my A6 dual coil or cyclone, itty-bitty 14mm RDAs, but with much more volume. I use it with a bottom feeding
mod. Also, I had to extend and reduce the diameter of the driptip with an modified Teflon driptip I had sitting around. I have a second on the way that I picked up on localvapes 25% off Labor Day sale.
The cons: price for quality (should be $35-$40), positive block moves when tightening the post screws, proprietary drip tip w/o an adaptor, soft positive block insulator, difficult to build (really no joke)