It's not a huge signing, of course, but that doesn't mean that it can't be a good signing. Let's take a look at some of the reasons why the Frenchman is a good signing for Roberto Mancini and the Blues.
Gael Clichy has been with Arsenal for the past eight seasons, appearing in 187 Premier League matches. That's impressive for a mere 25-year-old.
The EPL has a bevy of talented strikers, from Wayne Rooney to Didier Drogba. While bringing a young, up-and-coming defender from a smaller league might be appealing, you don't know how he will perform in the limelight.
Clichy, while at times inconsistent, has already proven his ability to play with the top talents of the world.
Clichy's new main competition, Aleksandar Kolarov, on the other hand, has only appeared in 24 Premier League matches.
It's an immediate upgrade in the experience department.
At £7 million, Gael Clichy is a bargain. He's not a high-profile signing by any means, but with how little it will cost Manchester City, they will still be able to go after a big gun (Samir Nasri, perhaps).
For comparison's sake, Kolarov cost £16 million. Even if Clichy turns out to disappoint, he wouldn't be the biggest bust in the world.
It's a low-risk, high-reward situation.
Gael Clichy will be moving from the No. 4 EPL squad (Arsenal) to the No. 3 squad (Manchester City). This will serve as multiple positive points for the Blues.
First of all, while I fully expect Arsene Wenger to sign a replacement, this transfer currently weakens Arsenal in the back. Clearly, this is a good thing for Manchester City, who finished just three points ahead of Arsenal this season.
Second, Clichy knows Arsenal unlike any other player on City. This season, the Blues tied and lost in their two matches against Arsenal. He could help them improve, both on the field and off of it.
At left back, Aleksandar Kolarov might have been one of the most disappointing players for Man City this season. Oddly enough, Clichy plays the same position.
Whether or not Clichy (a capable left back who can also move up into the attack if needed) replaces Kolarov in the starting lineup, he should at least light a fire under the Serbian international.
When it all comes down to it, Roberto Mancini, with this signing, strengthened an area that needed strengthening.