In reply to llanberis36:
I've got the zephyros 1, I bought it in 2014 to hike the Hadrian's Wall Path. There's just enough of a porch for a rucksack, my boots spent the night in the void between fly and inner at the end. It pitches all in one and takes maybe 5 minutes.
I think I paid about £99, bargain I reckon.
You can't sit up, but that's the pay-off for the weight.
The only downside is condensation in cold weather, but spring and summer is fine. It's surprisingly warm because of the small air space.