(This review was collected as part of a promotion.) We had a bit if a time time trying to install it with our metal doors but we manage to sucessfully install after removing certaun parrs that wouldnt fit. The code part was a bit confusing fior us as were older but successfully managed to figure it out and we love it. Added binus you can change the cides when we travel and our neighbour comes in to feed the pets wuth theirown code while your away. Thankyiu Weiser and Influenster for this wonderful opportunities.