Its always a tradeoff, you can never really win with a compressor choice IMO. I have a 60 gallon in my shop for my big tools and a tiny 3 gallon one I got on sale at sears with a brad nailer for like 60 bucks. Its pretty wimpy, but it does run my nailers just fine, and because its a pancake unit and super light, I can really take it anywhere. I could easily have it up on a roof running a nailer if I had to.
I certainly wouldn't mind having a little air sometimes, but you can't beat the portability, and when I was buying this thing that's really what my #1 concern was. Hauling it upstairs in my house to do mouldings, tight spots etc, it really works out well for my needs, and really helps not having another large piece of equipment to trip over when I've got my house in 1000 pieces ripping a wall down or whatnot.