E39 Child seats?

[NSFW]

Does anyone have the standard E39 base fitted in the rear of the car with the integrated booster seats fitted? Saw one on the Internet the other day and got me thinking that it might be a practical way of getting a booster my car if I had them fitted?

Are they well disguised and still as comfortable?

[ortontom]

just using a standard booster at the mo on short journeys, but using a recaro seat with speakers built in plus isofix. Search the internet, very good about £140