Absolutely love Krakow. Been there twice last year, and have been telling everybody about how much we enjoyed it, and couldn't wait to go back. Prices were brilliant - hotels, restaurants etc.
Last week I booked us a week in July with plans to get dental work done (Thanks WelshGooner for the advice)
When I went to book an Hotel, I was shocked to discover that Hotel prices have increased by 60%. I emailed hotels directly where we had stayed previously. Looks like the going rate is 400PLN (That's 100 Euro per night)