I have the eglu go up with a 2m run. I was keeping 4 bantams in it and they had room to re-arrange themselves. Worth noting 2 of them were Serama's, so about as small as you can get, and they were with a Pekin and Silkie bantam. If all were Pekins I wouldn't have kept more than 3 in there. I do love mine though, so easy to clean with a pressure washer. I do a 'spring clean' a few times a year where I take it apart to give the insulation/ventilation part a good blast too. One downside with the eglu go is that there's not a way of stopping the chickens from sleeping on the nest box. Mine go through phases of preferring to sleep in there than on the roosting bars. The feeders that come with the coops aren't great if you have bantam as they can't reach the bottom of the feeder, so I'm topping mine up a lot more just so they can reach the feed. The colour on the plastic coop does start to fade after 1-2 years.
As for predators, I've not aware I've had any try and get in. I saw a video on youtube that someone posted from home security footage of a fox trying to get in and it couldn't figure out how. That said, I would be more comfortable if the skirting was wider, just for extra peace of mind.
They are sturdy. I had storm this year that destroyed my fence on both sides but the coop and run where untouched, or moved.
They are a bit on the expensive side, but if you want an easy no fuss coop that will keep your birds dry and safe it's worth it. If you can afford, and have the space, I'd suggest getting the walk in run. I've spent way to much time crawling around in the 2 meter run when sorting out feed or flooring, there's not much room in there for a human.