I have an Eglu, with the extended run for it and I have to admit I love it, its so easy to clean out, move around etc and I would love to get an Eglu Cube, but just cannot justify spending a ridiculous amount of money on one, if they were a lot lot cheaper I would have one.
I also have a wooded coop (converted rabbit hutch) that I keep my pekin bantams in and its a pain to clean out, takes ages to dry once its been hosed out etc..
I guess there are pro's and cons for both, as Rosey has already mentioned, I keep both the Eglu and the wooden coop alongside my connifers and they get plenty shade/kept cool.
So my verdict it... i'd recommend an eglu