These electric insulated roller doors make garage entry a pleasure. They have surprisingly good insulation qualities and buying from Rollerdor is likely to save a lot compared to Crocodile and others. They are a universal design so future parts availability should not be a problem. I have bought 4 on a supply only purchase for my garage and sheds. I am now considering changing my last up and over door at the top of garden. The only downside is the slats are easily dented but they can be replaced individually. If fitting by a novice ,the instructions must be carefully read together with a visit to youtube. I was careless when i fitted the last one and broke the straps- no big deal though.