STI's have a lifetime warranty, and I've got nothing but praise for Sean at Freedom Ventures, really top notch service. As far as Glocks go, the parts are so cheap, and they are so easy to work on, I doubt if Id ever send any of mine off for any type of warranty work unless I had a problem with my Slide/Barrel/Frame. Anything else wouldnt be worth it, you can order parts for less than you'd spend in shipping to get your gun to a warranty center. The likely hood of having to use the warranty on either of the above mentioned brands is low though, imo. It usually seems like thats the way it goes, the best products have the best warranty, they can offer it because they have a track record of reliability to fall back on. Companies that have poor warranty/customer service are usually brands that have the most issues.