So I used my Lanshan 2 for a couple of nights last week. Both in sheltered locations, one night in crazy rain. I've got the '4 season' (ha!) inner.
Do I like it?
Yeah, I think so. I don't love it, but it's a nice roomy tent to sleep in. It's very practical and isn't too heavy. Being able to squeeze in one of my kids if needed is a bonus too.
Did you get wet?
Nope, no leakage. I'd seam sealed the bits 'they' say you should.
Was the pitch okay?
Mostly. My carbon poles support quite a high pitch and for the first night I was on a slight slope. I didn't use the 3F footprint and took polypro instead. Slippy mat + Slippy groundsheet + Slippy footprint meant I moved the whole inner tent foot-wards overnight. Something to be aware of. The shock cord holding the inner was doubled over for some reason which left very little clearance between inner and out. I untied the fishermans and re-tied with a single loop. There wasn't any adjustability in the cord, it was just doubled.
The poles, and my 3D printed mushrooms on the ends, tended to slip off their default location. You have to use the webbing loop to wrap around them so they don't move. It's not a great design, but you can get it to work.
Much sag in the wet?
No! Much less than on my other silnylon tents.
Good for bad weather?
This tent in high winds? Hell no!
Recommend it?
Kind of. It is what it is.
Good points.
Quick to pitch, behaviour in fair weather, price, room for the price, weight for the price, quality for the price
Bad points
Suitability for proper camping weather. The default pegs aren't great on muddy ground. I took a couple of 26cm 'a bit too big' pegs for the main guys as I didn't want to risk them.
Summary: It'll do me until I bite the bullet and pickup a Hilleberg Soulo, which I'm bound to do at some point