Gem installed a sliding door in our kitchen about six years ago. Recently the door lock broke and I went to Gem to buy a replacement door lock. Stuff does break after time, no big deal. At the store they were very helpful and looked up the model number of the door I purchased and said they would order me a new lock. Great! To my surprise Jim called a week later and said he has a new lock for me and I can have it at no charge. Wow, what super after market follow up. I would certainly purchase any further doors and windows from Gem and highly recommend them to others. Regards, Dave H.