Very shabby hotel. Room's interior dates back to the 1960's: old and timeworn, bathroom tiny with salmon pink tiles and stank. Room was very noisy. Whole third floor stinks of cigarettes. Staff tried hard to be friendly, but was rather unprofessional in handling our enquiries, poor English. Only positive thing was breakfast.
If you really want to spend your time in Graz in a nice but affordable hotel, I'd recommend hotel Daniel which is head and shoulders better (and cheaper!) than Gollner.More