I was there in late March of 2013.
It is once listed on the Lonely planet guide and it is no longer listed.. I guess there are good reasons for being de-listed. The place is old and dirty, the floor of the rooms are dirty, the bathroom and toilet is downright terrible With flies flying around...
Single rooms are tiny, really tiny...Like capsules sized..and the walls are like paper thin...you can easily hear what others are talking.
It is located on the main street but relatively further away to major slights and attractions.
I was planning to stay in Isfahan for 3 nlights and turned out I couldn't stand that place and flee away with an overnight bus on the 3td night.
Good hotels in Iran are inexpensive , treat yourself better.