I have one in 1/2 and 3/8 I like them both, the lithium batteries really brought mine to life. The battery lasts a long time for me. I don't use them daily though. I personally won't put a lot of faith in these cordless impacts when it comes to tightening. I go back with a ratchet or torque wrench (depending on what I'm doing) and double check things. Mine are roughly 2 years old and going strong. I don't baby my tools like some on here. I use them and sometimes abuse them like they are supposed to be so mine has been used a bit.
