My daughter had her braces removed and the orthodontist recommended that she clean/soak her retainer daily. My teenagers are always in a hurry and not known for being through, I thought this gadget might come in helpful in getting into the routine of keeping that expensive retainer clean. After a month, it is still working well and it seems to do a good job.  There is no timer on this model so you have to remember to turn it off after 15 minutes and it does "buzz" while in use but that's not a big deal. $10.00 was worth the price even if it only lasts a year or two.