You wouldn't have much living space with this tent - ie, for the cooker and a table and chairs to sit and eat at if it was raining - especially if there is more than two of you which I assume there is if you are looking for three bedrooms.
We have a nine birth tent - one room for the DC's (DD and DS), one room for us and one room for all the kit, the rooms are supposed to be 3 birth - but you would struggle to get more than 2 airbeds / more than one double in a room. Then we have a large living area - so we can cook and eat in there if weather is bad. We can have the cooker on it's stand - a table to serve on and a table for the DC's to eat at, we just eat on our laps. We can move the tables to the side and still have plenty of room to sit on floor and play.
IMO - large living area is essential.