I remember only seeing one or two at Walmart a while back, and then I went again recently and they had tons of them. I've been meaning to pick one up for a while, but hadn't gotten around to it.
I was tempted to get it yesterday during a Toys "R" Us buy one, get one 40% off sale on Star Wars toys, but didn't end up getting anything there. I was thinking about getting the A-Wing with Hera, Speeder Bike with Ezra, and Kanan and Sabine. I ended up just buying a bunch of 6" Black Series figures elsewhere instead.
I also got the U-Wing last night ($33 at Barnes & Noble after discounts), and I personally love it. I actually find the Nerf gun to be a fun addition, though I can see why some people might not like them. You can easily hide it on the U-Wing, though, so it can be completely unnoticeable there. The Nerf gun didn't really bother me in the pictures I saw of the A-Wing, and I'm definitely picking one up at some point.
I haven't bought any 3.75" figures in over a decade (I had a ton, and lost almost all of it, so I stopped buying toys for a long time), but after buying the U-Wing, it's kinda tempting to get a few to go with the vehicles and the figures they come with. At least they're only a few bucks. It's also easier to find more characters there, so that's a plus. I did some research on what was available a while back, and I liked the vast selection. I also checked out all of the Rebels ones, and have thought about picking them up (and was seriously thinking about it yesterday). I saw a comparison of both Hera's, and yeah, I thought the one with the A-Wing looked better overall, even if the helmet is stuck to her.