Have not long to think just because of the good reviews and good price, the films ordered. It works, but unfortunately one has to first on 2-3 films try until the 3rd or 4th work with good results. In advantage of reading the instructions thoroughly. But also should be improved because it is somewhat misleading. Luckily, there are 2 free films, if you like me to review writes. But one could forgive a star more then almost. Overall I would recommend buying