I have and it was ok. You have to watch the water coming through the slides. It''s better if you ask them to be careful. Very nice to have the under carriage wash. i used them last year on the way south but didn't find one this year.
I have used them quite a few times. I have found that there is a direct correlation between the amount of trucks they have lined up and the quality of time they spend on the job. Unfortunately, the price stays the same. I would pass them by if they are busy.
I recently got a great wash from a little hole in the wall shop off I95 near Savannah. Was much better than Blue Beacon and the price was better too. They took their time and did it right. Wish I could remember the name...
Thanks all for your replies. I will most likely go to one because I have only one place near me and they get upwards of $200 just for a wash. I can drive a long way for that kind of money and not have to unhook.