I’ve used the old Polaris (single skin) tent – wasn’t very good as foot was very low and prone to condensation soaking the end of your sleeping bag. Also quite low front door.
I owned a KIMMLite sub kilo which was a similar design but with a high front porch (good for cooking and getting in. Bit heavy/large pack size though
I also owned a Sup AIr, which was a brilliant roomy single skin tent – less prone to condensation problems because of its high volume, but also because it let loads of air through it due to holes above the doors at both ends – so it was chilly – also it had a ludicrously low front door so getting in and out was a right faff.
Currently using a Terra Nova Laser Photon 1 tent for mountain marathons, which is a similar design to the Laser Comp, but a bit smaller and lighter. Sleeps one or two at a squeeze (head to toe) – about .7 kg
The new laser ultra is even smaller and lighter, but I don’t want to spend another £650 just to save another 100 gms.
Terra Nova tents are generally all V good quality and customer service is top. I broke the pole on my Photon (or rather it broke in high winds (manufacturing fault on spigot – not design problem)) and they replaced the whole pole by return of post. If you look around the camp at any mountain marathon these days about 50% + (including almost all elite teams) will be using Terra Nova tents.
Laser comp is probably best compromise for the non-fanatic.