I have an Eglu. They are great as easy to clean. And I much prefer the look of them. I cannot see how a fox could possibly get into an Eglu. The run I can imagine, but not the Eglu itself. And re size mine all snuggle up in a tiny space anyway, they use about a 3rd/quarter of the room available to them.
I now have an Eglu and a ridiculously expensive walk in run. I found the Eglu run really hard to manage as you can't get in to them without crawling in chicken shit. The walk in run is great, so so much easier.
I'd recommend the Omlet (makers of Eglu) forum. They don't all own Eglus. It's a wealth of advice on anything you can imagine.
I'm not entirely smitten by my chooks. Have had various problems that have not made it the most easy and relaxing thing, but am happy enough.
One thing worth mentioning, is they do a lot of shit! Lots.