4 of us vacationing students stayed here for 3 days and had a great time! Overall we all rate it very highly and would definitely stay here again.
The pros are many and easy to list:
*Communication with Alex was wonderful. We arrived many hours later than our scheduled airport pick-up (€20 and worth it to us) due to flight delays, but he was still happily accommodating and sent a very nice driver
*He left maps and personalized restaurant/etc recommendations for us
*Clean, cozy apartment
*~10min walk to metro,~20min walk to Wenceslas Square, ~30min walk to Old Town -- and we like walking
The cons are very minor:
*The floors are squeaky, but did not bother us at all
*The window curtains are thin and the early-rising sun woke us up
*No coffeemaker (but there is a great hot water maker and tea) and we could not find bowls
Once again, the downsides were minimal and totally dwarfed by the positives. Thanks Alex and Ilona for providing a great stay for us!