DH was originally against 3 wheelers as a concept (he is very mechanical minded), but after actually looking at them he changed his mind. He was happy so long as the pram had big wheels and I could use it easily. It really depends on the brand and model of the pram, some 3 wheelers are great and some are not. As Sherie said have a look at Choice to see what they have tested, also they will often have an article on what to look for or to avoid in an item.