I rarely make house calls but my brother is an obvious exception to that rule (mainly because his car cannot make the drive on a full charge). I went up to give his Model S a thorough decontamination and seal before the nasty Rochester Winter hits. The Opti-Coat Pro+ I installed a year ago has held up so well and it is really a testament to how easy it is to maintain. My brother is not a detailer or really even a car guy at all and yet when I washed the car it was as if I had just installed the coating. He has been maintaining the coating with Opti-Coat No Rinse, Power Clean, and Hyper Seal. Pretty easy! Thanks Nik!