I honestly always read reviews before I buy something. There is also a lot of experience from the past with not really failing but not good products either if it comes to manufacturers.
Once you found a company you trust and have good experience from the past, I stick to it. Just bought an Acer 24" instead of any other company because I bought my last monitor 8-9 years ago from them and still use it. The one before that was Acer as well and one of the first TFT sold for common folk. Couldn't proof them wrong yet.
Only one time I did RMA in the last couple of years. This was the graphics card for my laptop AMD 6970M, which failed during gaming. Just went poof and I had to put the GTX 460M back in. This was soooo much trouble because I bought the laptop in US and had to ship it back to them for ~£20-30 postage. Then wait and they sent me a new one, guess what, the government wanted me to pay tax on it again etc. etc.
RMA to US was a terrible experience.
Or common knowledge with Hitachi (former IBM) Deathstar