Another Quechua fan. We have 5
for 3 of us
.
Quick overnighter with no packing room - one Base Seconds plus bedroom inner - me & the two kids squashed in together.
Bit more space - Base Seconds Full plus bedroom for me & DS (2) and four man 2 Seconds for DD (12).
Loads of space - as above, plus a Base Seconds for a living area (chairs, carpet etc) and one as a kitchen / dining area. Also got a three man 2 Seconds for when DS is a bit older and needs his own pod.
We took them away at the weekend. Some kind chap saw harassed mum arriving late in the evening with two kids in tow and offered to help. I said thanks, but I'll manage. He went off to the toilet block and by the time he got back all 4 were pitched and twinned!
It takes maybe 15 minutes to get them up, twinned, guyed and groundsheets in, and about the same to get guys out, fold and pack away. Hurrah for the cock and balls. ( Kewcumber , check the video clips on YouTube - it's easy once you get the knack.) And yes, I with all of them! 
Happy pop-up camping.