I have the Biker, had it for a few years.
Its really easy to pitch for one person, but I would recommend getting a cheap/old shower curtain to go under the groundsheet, as its not that thick so is easily damaged and it also keeps it a lot cleaner.
I have used it for 2 x people, 2 x sets of bike kit, & 2 x bike luggage. At a push you could be 3 people, and bike kit, but you would have to pack light and be good friends
.
If they get damaged (such as ash burns, thanks prats at Farmyard, I did ask you not to light the fire so close!) then you can buy new outer sheets, but it is like fighting a baby octopus to put them on
and also new legs etc
They do require extra guy ropes in high winds, more than any other dome tent I have used.
The only downside to them is the size packed down and the weight, its a bit much if you traveling two up on a bike.