I've had it done. I've v fair, v fine and ruler-straight eyelashes, Length is medium. Even with mascara my eyelashes are difficult to see/notice. Did extensions, looked amazing for a week and then twisted and looked ridiculous and annoyed the hell out of me. So I tried lvl. Result is good, v natural. I still need regular amounts of mascara but at least I look like I have lashes. I suppose the result is like mini extensions. I recommend giving it a good. Takes 50-60 mins and not as much money as extensions. Lasts way better.
Ooh am intrigued by this! Used to have extensions but never again after the state they left my lashes in. I would recommend the OP to try Revitalash too; it's a serum you paint onto the lash line. It's made my lashes longer.
I tried Revitalash in the past (brow one too) they did work pretty well but its an ongoing, lengthy (and ££) process. I've got some of the No7 serum (though it leaves annoying bits in my eyebrows so I need to remember to use it - that always helps- and do it at night only)
I could have the instant effect of LVL and the ongoing effect of the serum.