We bought a 'whizz-bang' port-a-cot with a basinette and rocking arms (that go underneath to rock the whole thing)...it's bulky and heavy... I would recommend finding the cheapest (but good quality) and lightest port-a-cot out there unless you intend to use it all the time. We've used ours for about 5 nights so far all up... We had intended to use it with bubs in our room for the first 6 months but it made too much noise so we put him in his cot in his room instead.

A port-a-cot with all the 'extras' was a waste of money for us...

I have heard though that one thing to look out for is a port-a-cot with sides that are all mesh so that bubs doesn't suffocate up against the edge of it if they roll to a side.