We had wonderful time during our visit in Zurich last month. Sal was very polite, caring and professional guide. We had 2 days fully customized tour visiting zurich, bern, interlaken and grindelwald, specially arranged by Sal to meet our request. Sal brought us to some special places that you may not see with other tours.
The most important thing is you feel like you are not travelling with a local tour guide but instead like with your own family.
Certainly will use his service again when we return to Swiss. Hopefully much longer.