lego city playmat: how cool is it?

[Artifex]

I came by this Lego City Playmat. It looks really nice, but I'm sort of biased because I always loved these things when I was a kid.

Speaking as an adult, how cool are the Lego playmats? I saw a couple of pics on the internet, and they look nice, but my real concern is: how useful are they in a Lego city? Can you mix them with roadplates? And if so, do they look nice? How do they look in a Lego city, among modular buildings?

This is the link http://shop.lego.com/en-GB/LEGO-City-Playmat-850929;jsessionid=2n7B2+8p2eWh-FnBRgbCLg**.lego-ps-3-1

[rollermonkey]

I do not believe that they are the same exact scale as baseplates with roads, just based on the dimensions.