ケータイ捜査官7 (Keitai Sousakan 7) worth it?

[Kyo28]

I was thinking of picking up the ケータイ捜査官7 blu-rays. I watched the show on TV and I'm pretty much into it, but I was wondering if everyone already bought one of these blu-rays and if so:

• how the quality of the image and audio is
• how the extras on the discs are (if any)

Amazon seems to offer them at a relatively reasonable price (for Japanese domestic releases, that is):
Amazon Japan

Also, are there any other domestic Japanese blu-rays (so series/movies made in Japan) that you can recommend me? I'm looking at マクロスF (Macross Frontier) and コードギアス 反逆のルルーシュ R2 (Code Gears - hangyaku no Lelouch R2), but haven't decided yet.

Any feedback would be welcome.