> with respect to headroom, how is it right in the centre?
> Sufficient for a 6 plus foot person?
I am 6' and I have enough headroom, but not enough for two people side by side. Two facing each other would be fine.
I use it as a solo tent so the headroom isn't and issue.
> Also, are the side guylines pre-attached to the peg out
Yes. All the standard guylines are attached.