I have been looking into this in my usual obsessive detail as I am looking to build a bike shed. Not an Asgard for me.
I own a flat with an Asgard shed which I supplied and fitted for the tenant. It is fine, but IMO no more secure than a properly secured wooden shed and it doesn't look as good as it did when I installed it a few years ago. There is some rust and it has faded. Condensation is also an issue, but that's probably because she puts the bike away wet.
For my bike storage I'm going to make a wooden shed with slate clad walls, green roof and a steel reinforced door with a container lock. You will need an angle grinder to get in. It will cost about the same as an Asgard, but I think it will be better in every way.
I've never found a timber shed with a sold secure rating.
I bought my Asgard shed 10 years ago, I took notice of them after a recommendation from a friend and really paid attention when I saw two Asgard sheds at a school that had been subject to an attempted break in, the doors had been pryed at and damaged but had not given way. This was in contrast to the "Argos" metal shed nearby and the 2-3 timber sheds which had been thoroughly opened and emptied. I think Asgard supplied replacement doors and AFAIK they're still going strong.
My Green Asgard shed suffered some fading, first noticed a couple of years ago. I spoke to them and they suggested using a mild car polish to buff it and its back to normal.... In contrast tp the at least 5yr painting of a timber shed. I have no rust.
Its dry, its water proof it has power to it. Condensation is an issue in cold weather, but I dont store clothes in it, the bikes see plenty worse than condensation liberally being sprayed with rain, road gunk, salt etc each day. Short of bringing them in the house, they're always going to get cold and attract condensation. I have however ply lined the lower half of my shed to prevent scratching more than anything and have a 10" surface mount fan that hangs over one of the vents to blow air out of the shed in winter. I've never got around to making a proper mount.
A mate of mine has a stand alone brick built garage, I dont think it is any better for condensation.
Essentially my insurance co are happy with the shed and that's what matters to me. Getting them to approve a home built shed would be a pain at the very least.
If it lasts another 15yrs it wont owe me a penny... And ill probably still be able to weigh it in!
Now then asgard..... Where's my beer?