My wife & I will be in both cities in September and want to do a few guided walking tours. We have the Rick Steves guides for both cities. They mention that the "free" tours may be prone to having ex-pats that have memorized a script and really don't know the area as do the locals or professional guides. The books also recommend private tour guides, but we're not going to do that.
We've used Viator with much success elsewhere but have also come across something called Sandemans that has a mix of free and paid guided tours. Has anyone had experience with them? Can anyone compare Sandemans to Viator? Any other recommended tour companies?
Thanks.