I've got two Alaskas and have kept hybrids in them with no escapes. I don't find them particularly hard to put together and I actually like the flatpack ability, better for storage!
The access is great with the Alaska with the two big doors. With a Barney you'll need to plasticote the wooden bits. If you're planning on keeping robos at some point then I'd advise the Barney, if not then I personally would rather have the Alaska and £13 extra worth of toys
