This is a really great carry cot. We found it really useful up until our baby was about 5 months.
It's a good size. Small enough to to fit in the boot of our car with the pushchair frame but not so small that babies grow out of it really quickly.
The inside is cosy and attached with Velcro so can be washed easily.
It detaches from the pushchair easily by just squeezing one handle on each side and has a useful carry handle so you can leave the muddy pushchair outside but bring in a sleeping baby.
Not a necessary purchase as the seat that comes with the oyster max can recline flat so can be used from birth however I didn't want to be strapping a newborn into a pushchair and really liked the cosy carry cot.
This is a great carry cot. We found it really useful in the first few months.
It's a little on the small side compared to some others like the one for the uppababy vista but this means it fit easily into the boot. We have a reasonably large car and couldn't have fit a larger one in as well as the pushchair frame.
It has detachable padded sides that make it nice and cosy and can be washed easily.
It ataches easily onto the pushchair frame and detaches by just squeezing a handle on either side.
There is also a useful handle on the hood so you can car it into the house if you baby is asleep and leave the dirty pushchair outside or in the garage.