BB 床 - doesn't matter as long as it meets all safety standards and the railing on the side can be adjusted up and down
BB 車- This one is more important. Be sure you can open and collapse the stroller by yourself with one hand (it has to be light enough and easy to open and close). This is in case you have to go out with Baby by yourself. You need to hold Baby in one arm and open/collapse the stroller with the other one.