Martin's place is situated in a great location in the Old Town. We walked everywhere from the apartment. There is on-site parking if you are coming by car or renting one which is a bonus.
Would advise to take a cab if coming from the train station as it's a little bit of a walk and old streets are not the greatest when hauling luggage.
The apartment is spacious and has all the amenities one would want. Its a good value for being right in the midst of Old Town, but does show its use and age.