Vaude tornado light.
This has served me very well over many years and it's had lots of service. Now the zips are pretty dodgy and it's not as waterproof as it was. It really needs to be used on extra ground sheet, and will let in a bit of rain when it's heavy. I've just used it for 2 weeks in some pretty wet weather. It was manageable.

I think it could serve fine for a few purposes:
- fine for a kids play tent
- fine for a festival, if you're not unlucky with the weather (please don't just dump it!)
- if you're thinking of doing some tent backpacking but don't want to invest before you've tried it. These days it's quite heavy for a backpacking tent at 2.8kg. But it's comparatively roomy inside.

Backpacking 2 person tent (Shrewsbury, Castlefields)