Worst 4 stars where I have stayed, room wasn't what I ordered and service wasn't good.
When we arrived to the hotel, reception was not open and I talked by phone to some customer service and keys came to me by electric lock.
When I asked about free parking what we had by hotels.com, they said that "I don't know about that and hang off the phone"... I tried to call again but no answer anymore.
I think hotel Otto is 2stars bed&breakfeast hotel in good area.