Worth it's weight in gold. Very simple to build and troubleshoot. With so many experienced users on this site all you've got to do is ask and you'll get several answers if problems arise. I bought a Kraken and it cost $150, it's a nice piece of equipment, produces a lot of vapor but so far the taste has been ok. Not throwing the kraken under the bus as it's likely my build and hopefully that will get better. But at nearly $50 more I'd say the KFL is an absolute bargain and I will be adding another very soon.