I've got a membership there. Just about everything that I've read here about Gilbert/Sharpshooters has some truth to it. It's not perfect, no. But overall, I find it one of the better indoor places here to shoot, which is why I keep going there.
The vast majority of the staff there really do want to help out. There are some guys of all ages, young to older, and they're all pretty cool. There's also a "middle aged" woman who is just hilarious, total rapier wit. She's a lot of fun. There's a gruff older cop there who looks for all the world like a retired Marine. He's very gruff indeed. But he's also straight-forward, and he's fair. He also knows a heck of a lot.
The RO's range from quiet and helpful to gregarious and helpful. If they find that you're really into it, they'll help you out and give you tips. They also pretty much leave you alone unless they see you doing something stupid (e. g. sweeping people). Then, OH-YEAH will they jump in, and rightly so! Again, good folks.
The lighting system could be more flexible. It's really geared for the common distances of 4yd, 7yd, 15yd, and 22 yd (their max distance). It'd be nice if there were a 10yd distance for the lights. Also, they could be a bit brighter sometimes. Maybe fluorescent lighting could be an option in the future.
There is no air conditioning in the range. Personally, I don't mind that, since I don't care what temperature it is. However, they really need some kind of air handler upgrade that will constantly blow the air DOWNRANGE. Too often I've gotten a face full of gunsmoke after taking a shot, and I am kinda concerned about lead poisoning. Hopefully they'll do this at some point soon.
They allow only handgun cartridges due to backstop limitations. So, no .223/.556's, and definitely no .308 Winchesters. But they'll gladly let you shoot your .454 Casull rifle.

And shotguns are allowed, including birdshot.
All in all, it's the best choice around here for my needs. The range may not be "perfect", but it is certainly serviceable, the people there are pretty cool, and I feel comfortable walking in there, which is the most important thing. The membership prices are reasonable, and there's nearly always a lane available. Their inventory of guns is also nice, though priced a little high. Their gun rental policy/pricing, and the guns available for rental, is good.