I have used Waves and Wheels in the past and found them to be excellent, but also had to wait at times, but it was worth it. Also, they were on par with pricing with competitors for the Wax job, but a bit pricy for the weekly or bi-weekly general washing. 3 seasons ago I switched to a few different detailers in one season and was not as happy, then 2 seasons ago found that Crystal Shine was decent detailers and reliable (within reason) a couple slipups, but well worth the savings. They are due to Wax my boat this week before Friday, I hope!!
I would wait for Wave and Wheels if that’s who you chose, just let him know that a courtesy call is a priority of yours. I tell my guys to just call if they can’t make it and I will work with them. But just don’t leave me hanging. So far it has worked.