We are two couples in our 70's. We took a private tour. It was four hours and we saw a good bit of San Diego. The tour is pretty casual. Roxane is great to work with and will accommodate your wish to spend a little more or less time at an attraction. Roxane is originally from Paris but she has lived in San Diego a long time and obviously loves it. The depth of her knowledge is not what some tours might offer but it was enough for us and it was never boring. A big plus for me was that she didn't tell any corny jokes as so many tour guides feel compelled to do. We were a bit disappointed that the tour did not include Cabrillo Monument. I should have tried to negotiate that. We enjoyed it, though. I am betting the beer tasting and wine tasting tours are great fun.