We didn't stay in the hostel, but went there for the free walking tour and then went back for lunch. Maria took us and about 10 others on a walking tour of Split. She was fabulous. She provided all the history you'd expect, but was also willing to share some stories about her own family experiences. It lasts about 90 minutes. Please on't regard this as a free tour. If you can afford to tip Maria, the other tours charge 11 to 15 Euros. This seemed a much smaller and less stuffy tour group than the others we saw.
There was no expectation that we return to the hostel to eat. In fact the tour didn't end there. We did go back though and had a great lunch, local beer and free wifi.
The tourist info office has a map that shows how to get there.More