César has loads of experience, plenty of trophies, and has been excellent in the past. He is young enough (for a keeper) to still compete for a first team role, yet old enough to not hinder Szczesny's development or block his path.
He's just had a solid season, has adapted to the premiership, already (presumably) has decent English, already lives in London, his family is already here and there will be no adaptation period on the pitch or off the pitch.
So what if his wages may seem a bit high, this signing would be excellent in my opinion. We don't need a world class keeper imo, Szczesny will be great, he just needs some solid competition and César would certainly provide that and may even usurp him for the next season or two.
