I bought a travel sized version from Mecca in Custard to see what all the hype was about and I just didn't get it. It settled a tiny amount into my lines, but went on smoothly. It just wasn't the coverage I was looking for. Its also the same price as Mac pro longer concealer for about 2/3 the quantity. It seems like a great product, just not for me!
On the plus side, the travel size was great for travel.
I have the mini size of this concealer and find it really handy for travelling or in the handbag. It has a doe foot applicator, and has pretty good coverage. I was recommended this concealer for both undereye and spot concealing. Because it's quite thick, it was a little tricky to blend it well under the eyes but if your eyes are less sensitive it could be worth considering for you. The colour I was matched to was a little bit light, but the next colour up was a bit too dark.
Tips: Consider using a brush to blend if your fingers aren't doing the job.