(and I still prob cant spell it!!)
I was trained with and still use Nouveau Lashes, I find there products excellent quality and think there reputation speaks for itself. I trained in Nails at CND with Diane Plummer and given that she is now a trainer for Nouveau I think that also speaks volumes!
Technically speaking they ought to last around 6 weeks before rebalancing or infilling them, a certain amount of lashes will fall out with the natural hair cycle but if (and thats a big if) the client sticks to the aftercare the infilling just ought to be a case of replacing the the ones that came out in the natural cycle.
As with nails lashes take an amount of getting used to for the wearer, lash curlers and eye rubbing are banned as is oily make up remover!
There is alot of companies jumping on the lash bandwagon I think, but you need a quality products with alot of research having gone into them (with it being products going near the eye) which is why I would only buy products from a supplier with an excellent reputation in that particular treatment, hence my choosing Nouveau as I had heard only good things and spent time researching into Karen Betts, Nouveau and spent time watching her perform at Gmex a few years ago. At the same time I also visited a stand from another lash brand I had heard of vaguely and they were more competative price wise, as I queued up to enquire about training I was stunned to see the queue was full of people complaining about there training and products not lasting!! I made my mind up there and then to stick with quality reputation!