Wanted to get some thoughts on the location of this hotel for first time visitors to Vienna. Debating between paying cash here vs using points at the Park Hyatt.

I know the PH is much more centrally located but the Andaz doesn't look to be that out of the way and the cash prices are tempting. How is the public transportation in Vienna? In a city like say, Tokyo or Beijing, being 5-6 train stops away is nothing. Is it a trek to get from the Andaz to the central areas?