I used New Wave for 17 sets of doors in a development which was completed last year. The New Wave is a high quality product that works so much better than any other door we have come across. We are about to order another 10 sets for our next development and because of the way the New Wave Door works by incorporating them into the design from the beginning, we have been able to substantially increase the amount of fliving space. If your are building a dwelling or an extension you should use these doors because there are so many benefits over bi-folds. I have noticed a few negative comments about customer service but it seems a little unfair as the current situation is affecting service and supply across the whole sector and I am speaking from experience.. I have dealt with many window and door suppliers over the years and I can highly recommend New Wave Doors on both product and customer service. Their service to us has been outstanding.