Trainers were good quality. However there are a few standouts that are worth the switch! I already have a couple voice to text solution that I am comfortable using and didnt really want to deal with hardware that was tied into a subscription based service. The parts bag wasnt sealed and I only ended up with 2 long screws and one short top screw, so half the parts had fallen out of the beat up and torn open box somewhere along the way. I even tried breaking them in before the wedding. I recommend these for everyone! I am returning this mouse and sticking with my old one until I can find another suitable replacement. I dont like it. Not sure where some of these complaints Ive read about come from. The quality difference is worth it.