Probably an OK starter set for a weekend mechanic, but you would be better off buying these things individually.
If you look at the question and answer section someone asked the max torque for the impact and air ratchet. The answer was 230ft-lb for the impact and 50 ft-lb for the air ratchet. I had one of these 230 ft-lb impacts when I started out and got tired of still having to dig out a breaker bar and a pipe to free tight rusted on hardware. I would recommend getting a Harbor Freight "Earthquake" impact when it goes on sale. It has 700 ft-lb of torque and I haven't found anything that it won't zip right off. The torque rating on an air ratchet only tells you how hard your fingers get squashed when they get caught between the ratchet and something else. You usually break and tighten the hardware by hand and only squeeze the trigger to spin the hardware on and off.
That air hammer is a little more than a noise maker that massages your hand. I have one. I'm sure there is a low cost long throw HF type of air hammer that really works, but I eventually broke down and bought a rebuilt Snap-On 3050 air hammer out of the bargain bucket for a little over $100. (Whenever you go onto a snap on truck always look in the bargain bucket, I've bought more than a few tools out of the bucket and was always happy with my purchase) My 3050 air hammer kicks harder than my 44 Mag, and I literally have to put gloves on to use it. If you really need a good air hammer, save up and get a good one.
That set does not include a full set of sockets, so you will need to fill in the set piecemeal. Just get the impact socket sets from HF. They are cheap on sale and hold up well.
I don't do cheap air fittings like the ones included in that set. I've had friends who used them and heard more than a few stories about the male connector breaking in half. I've been using Milton connectors since Reagan was president and am still using the same exact connectors. Napa sells them and they aren't a lot of money.
Hope this helps,
Chris