We went in the early morning and was able to get a reduced price for doing so which was a nice treat. The price included all the climbing gear. We received a brief introduction from the staff as I've near climbed before. There was other people and kids there but we had enough space to climb several times without bumping...
Our leadership team went there to do some physical team building exercise. It was fun and exhaustive (for our hands). They have friendly staff who guides you throughout.
Great for kids as well I imagine. Don't fear falling down - they have got it covered.
Visited in Oct 2014.
I have been to the Sprague Street location several times with my young kids (6 - 13 years old, boys and girls) and they love it. We usually buy a 10 pack of visits to try to keep the costs manageable and stay for about an hour doing bouldering. The kids always leave exhausted and with blisters on their hands...