This particular tuner was originally designed for the FT-817/FT-818, and actually comes with a CAT cable for those radios. Thankfully it also works with most QRP radios, and the tuner is actually good for up to 30w.
So far it's worked with my 138' EFHW, and my Hamsticks, so it's definitely a keeper.
The radio itself is pretty intuitive, and it gets easier to use every time I get it out of the case. I actually busted a pile up with it the other day, I heard a station in South Dakota calling CQ POTA, and he was immediately hit with a pile of stations calling him.....and I was the guy who got through with 20w!!! It made my day!!
Stay Safe Out There!!