I've known Mark for years. He's extremely friendly and positive, and is as sharp as they come. As a successful entrepreneur Mark is deeply involved in the Chicago tech startup scene and knows his way around the city. You'll have a great time and learn a lot if you are lucky enough to be hosted by him.
I've known Mark for a few years now. It's always fun running into him; he's a great conversationalist and entrepreneur and an easy person to be around. I'd trust him with my luggage, and laptop, and to show friends some great places around the city.
Mark will be the absolute best host / guest you will ever have. Bold statement to make on website where everyone is a serial traveler and host. I say this because he has hosted hundreds of guests on (website hidden), and I was there with him for most of it. He knows exactly how to treat a guest properly, communicates clearly and efficiently, and even better he knows the city like the back of his hand. Most people would pay to gain access to the knowledge in his head of the outlandish and interesting things to do in the city, but you can get it for free by staying with him
I've known Mark as a member of the Chicago tech startup community for quite some time. His integrity, candor, and personability are extraordinary.
As both a host or a guest, you are in safe hands with Mark.