Review (1/5): UPDATE!  Contains MMA.
UPDATE!
I’m so positive this mon9mer contains MMA which has been banned on the US because it it so toxic. I came to this conclusion when I tried to remove the nails. Non MMA monomer nails come off easily after soaking in acetone. You need to file the surface, then soak them for 10-20 minutes. You then scrape it off and it comes off in flakes and bits and pieces. You may need to do this more than once. With MMA, you use the same process, but once you start scraping it is a sticky, messy process and as soon as the nail is out of the acetone, it immediately starts to solidify so you really have to do it over and over again, or do the scraping while the nails are in the acetone.
This monomer works well, doesn’t cause my white to yellow at all, but it reeks! Just opening the box I was overwhelmed by the smell. It only got worse once I opened it. After using it for a while I went nose blind, which happens with all sorts of smells, but when my husband got home from work he told me to go outside to use it, lol!