Mmm I'd have to disagree. I swear by face primers, I have a lot of them and I like a lot of them but I definitely would not put this one at the top of the list. It does leave a nice soft feeling to the skin but as far as I can tell, that's all it does.
It does hold my make-up on for a little bit longer than if I wasn't wearing a primer at all but it's nothing fantastic. Without primer I usually get about 4 hours of make-up wear, with a good primer I can get up to 14 hours of make-up wear. With this primer I'll get about 6 hours.
Illuminating? I can't see any form of illuminating at all, especially not once I have make-up on over the top of the primer.
Other than having a Chanel logo on it, this primer is really just a semi-mattifying gel (and not a very good one at that).
30ml costs $78 at Chanel counters in Australia and will last you a few months.
I won't repurchase, I doubt I'll even finish the bottle, it just doesn't work.
Chanel make some fantastic products, this just isn't one of them, sorry.