I avoid most LGS because the workers always think they know more than I do and treat me like I know nothing. A guy at my office has an FFL so all my x-fers go through him. I rarely have to deal with LGS personnel. I'm sure there are exceptions but that's the stereotype and it has held true in my experiences.
My biggest complaint was when I purchased a rifle several years ago at Cabelas. I'm in Texas. I tell them I'd like to purchase the rifle. They then place me in a line comparable to a ride at six-flags. I tell them, I have my DL, CHL, and credit card and I'm ready to fill out the form, pay, and leave. They tell me I have to remain in this line, fill out the form on their idiot-proof computer system, agree to their rules of firearm purchasing and consent by signing a form, wait for at least 20 minutes while all those ahead of me without CHLs have to have their BG checks run... Needless to say, that was the last time I purchased a firearm at a major chain.
I love ordering EXACTLY what I want, usually for less than a LGS... and have it shipped to my FFL at work... walk in, fill out the form, pay the x-fer fee and I'm done. Literally the process takes all of about 2 MINUTES!