To be honest I think their all pretty standard the same. We have a mamas and papas one. probably something you would expect to be of decent quality.
Its difficult to put up and no difference to comfort etc.
I find travel cots feel hard on the bottom, even with the 'mattress' or cover they come with, I'd personally suggest buying a normal priced one, then getting a cotbed mattress to go on top.
Havn't looked into it myself on price etc but heard about doing this =) x