Definately worth paying a bit extra and getting a "trade"version rather than "DIY" as they will last longer and feel safer in use (less flexible) the downside is that they are heavier. The triple section makes it easier to store and carry about, but again is heavier than a twin section. I've got a Youngmans triple section one and it has been excellent and seen a fair bit of use. The best ladder by far is a wooden pole ladder, but they just come in single sections so you need to buy one the length that you need, so storage is more than a bit tricky.........