Don't second guess yourself, this IS the place you should rent from.
Took my family (wife, 12 year old daughter, 14 year old son) to spend the day on Lake Mead. I get leery when renting boats because I've been scammed in the past. From the moment I walked in at 8am Kristin went out of her way to help make me comfortable and treated me as if I'd been a customer of theirs for years.
She told me if I go over my projected 4 hours it wasn't a problem, I'd be charged for the hours on the lake or the full day rental...whichever was less. Less! I was shocked and when she shared I didn't need to call or come back to notify them I went from shocked to flabbergasted. Wow!
I could go on and on about the professionalism of each employee we came in contact with from the time we got there until the time we returned the boat (after 5p) but here's the bottom line; I'll be back, I'll refer everyone we know, and I'm exhausted but taking the time to leave a review.