the MMA is a very dangerous thing i also do my own nails( got burned out doing it for a living) the mma dries out your nail beds severely as well thats why your nail beds are white and chalky after a set with it . It also keeps the nails on for a long time with no lifting but it can cause serious problems including cancer! But i have had many people come to me after going to these shops and their real finger nails were falling off i had many clients come to me with severe cases of fungus because they don't sanitize like they should and honestly i like that it takes a little longer to do a set (more personal) than to whip them out in 20 min at those salons. I went to one to get some airbrushing done for my wedding (don't have an airbrush machine yet) all i asked for was polish ant air brush she started to file on my nails and get the liquid monomer out i'm like what r you doing just polish they just want your money she charged me $10.00 for it i about died!!!
Just be very careful where you go and also ask to see the bottle of the product they are using if they can't produce one high tail it out of there quick!!! A lot of these shops but it in bulk with the mma so always ask!!