Good quality product and very easy to set up. Good size - very comfortable for two. Would be a little tight for three.
The Seedhouse SL 3 is a high quality and very light tent. Packability is superb. I've used this tent backpackting on the AT with my two daughters (12 and 9). There is sufficient sleeping space for us; but three adults would be tight. We've experienced light wind and rain with no leaks or stability problems. Set up is quick and easy. You can not store multiple backpacks in the small vestibule. In fact, the one-door design makes it difficult to store one backpack there. MSRP is high; look for it on sale.