I got this as part of a set so didn't just buy it outright, its nice moisturising and light. You can put it really close to eyes without any puffiness.
However I haven't noticed any plumping/firming of the skin or any affect on my fine lines!

This serum is very light, extremely hydrating and fast absorbing. It is PERFECT for under make-up and concealer. It makes my cream eyeshadows last forever and not run. It also makes the concealer sit right.

It comes in a little luxury bottle with a pump. The packaging is very neat. The product spreads very well. I anticipate this will last twice as long as other eye products I have. The price is in par with other eye products (at around A$45).

I noted that it does help skin elasticity and plumpness, but I can't really comment on the firming effect coz I am constantly scratching and rubbing my eyes due to eye allergies. My guess is that it does firm the skin. Also I have extremely reactive skin around the eyes and have not observed any reaction to this serum. All in all this is a very good product.

Update one year later: my allergies have died out and now I can confirm the firming effect of this product. I am actually very impressed with this so I am increasing the stars to 5, though I must say the pump gives me more product than I need. It spreads really well so I could use half a pump.