I've used this mask a few times now, normally applying it at night. It is kind of a tricky one to review as the effects are actually kind of hard to describe. You apply in a thick layer, leave for 3 to 5 minutes then simply blot away any excess - don't rinse (apparently this is so the plant extracts will continue their 'beneficial effects'). I have to say I love the convenience factor - you can just apply it then go to bed basically, without having to worry about rinsing, toning and moisturising etc.
The Express Flower mask feels lovely and soothing when you apply it, and certainly makes my skin feel moisturised. My skin the next day definitely looks healthier and more hydrated and a bit more rested (not sure about toned and firmed). However the effects are not quite as pronounced as the Radiant Glow mask, which really does do exactly what its name suggests. For me I would say the Express Flower mask is more of a treatment mask if that makes sense, something I'd use to give my skin a moisture injection rather than to give me a glow for a night out or special event (although the Sisley website does say the mask is ideal before an evening out to make the skin look 'rested'). The effects aren't quite enough to make me want to forego wearing make up, which the Radiant Glow mask frequently does, however I do think my make up looks better after using the Express Flower mask.
I'll certainly use this up, and it will be a nice treat for the rest of the winter when my skin is a bit dehydrated or stressed, but I think my skin is perhaps a tad on the oily side to see the real benefits of this so whether I'd repurchase I'm not sure. If you have skin that's on the drier side however, I think this would be a real treat.
Sisley Express Flower Gel Mask costs £72.50 for 60ml.