I started buying LV in 2007 and I haven't had a bad experience (yet). Yes, of course I've encountered some rude, unprofessional sales associates, but I just don't buy anything from them. I think we do hear more from the unhappy customers; most people won't say anything if they received excellent service as that's what they'd expect from luxury brands like LV. We often set a very high expectation (sometimes unreal) for luxury brands and when it doesn't meet our expectations, people complain.
I would like to share one of my wonderful LV experiences: My parents had bought me an DA Speedy 30 when I graduated from college in 2008. The very first time that I carried the bag, I got color transfer all over it (canvas and leather). Apparently one of the shopping bags bled all over my bag and I didn't notice it until I got home. By then, it was too late; I was so upset with what happened. I took the bag to LV to see if there's anything that could be done (cleaning, repair? I was an LV newbie back then). The lady who helped me happened to be the store manager and she was the sweetest lady that I've ever met. She actually apologized for the experience that I had and even offered to exchange the bag for me. I was in disbelief. She KNEW that I had caused the color transfer, but it didn't matter to her. She even went above and beyond to look for a MIF bag for me (the one I ruined was MIF) just so that I could have the perfect graduation gift. I ended up exchanging for something else because I was worrying about color transfer. They've gained a loyal customer ever since. I must say, not even Chanel can provide excellent customer service like LV. This is why LV will always be my #1 LVoe.