I'm writing this to pay homage to the fantastic Graco Pack & Play Tavel cot!
I bought this for trips to my parents when my son was newborn, it it very cofortable for a young baby at the upper level (bassinette) and equally comfortable for an older baby/child.
It comes in it's own case, and includes a battery operated lights and music feature (which I haven't used but soothes young babies) in the bassinette mode.
This has now doubled up as a secure play pen (so you can get on with ironing etc.!)and serves a dual role. Although it was £100 and quite pricey in comparison to other models but definatley worth it!