Please help me - I'm a novice at nail polish and need advice. I've just started growing my nails and want to start using a nail strengthener but I'm baffled at the choice out there. I stood in Boots wavering between buying the Opi Nail Envy and various Sally Hansen products. I decided not to buy anything until I had consulted the wise women of mumsnet. The Sally Hansen products are so much cheaper than the Opi. Is it worth paying the extra for the Opi Nail Envy and if Sally Hansen is just as good which of the various different products do I choose. I'm tempted by the Sally Hansen Complete Care 7 in 1. I'm not going to use a nail colour so whatever I choose will be the only product I will wear. Thanks