I stayed here last night, and was very satisfied with my experience.
The location is brilliant- as the name would suggest it's close to Theatreland, but also the bus station, George Square, Sauciehall St and everything else in the city centre. 2 good restaurants next door too- La Bonne Auberge and De Maggios.
The staff were all very friendly and helpful. My 3rd floor room was spacious, clean and had a comfortable bed, plenty of tea/coffee and wardrobe space. Ensuite was very clean too, only downside being the shower pressure wasn't great, and the Jets left a large gap in the middle with no water!
Otherwise a very good value City centre hotel ideal for business or leisure.