My brother and I have the craftsman I linked u to earlier. Its perfect for the occasional use and Im sure it will last a long time with the type/frequency I use it for. You can leave the battery on the charger and it wont kill it (Ive got to remove batt from charger for my drill)...itll just switch over to battery tender mode. I think I did a trq test with this one because the HF cordless impact I had before fell WAY short of the claimed trq and this one was very close to claimed amounts. I read reviews when I bought it and guys mentioned that once you get the lithium battery, its a completely diff beast with more power (Probably at what its rated at) and iirc, faster charge time.
Kit I got didnt come with a bag, but it fits perfectly in my drill case, so I just toss it in there when I take it with me. Its light, has lil LED to light up what youre working on and feels good in my hand.
Would def recommend for the price for what I use it for (Not mechanic, ocassional use at home changing tires and random suspension work I do every once in a while).