Some places benefit from keeping it simple and this is definitely one.
I paid 40 pounds for a room with no window, as I am an extremely light sleeper and it was worth twice as much. One of the best night's sleep I've ever had in a hotel. The bed was super comfy and it was extremely quiet without the street noise. Very clean too. Though Caroline Street is not exactly a major roadway. Was genuinely tempted to book another night just to sleep there again. The wet room shower is great (I had 3 goes in it). Excellent location, less than 5 mins walk from St' Paul's Sq and it's wide array of bars and restaurants. Only took me 20 minutes to walk from New Street too. Well worth a stay. Only thing I would say is that while the room's are great for one with their compact design, I would think two people might trip over each other (but I can't deduct a mark for a theory I haven't tested. They do a continental breakfast for around 5GBP, but I didn't go for this, so can't let you know about the quality of it. Will definitely stay next time I am in Birmingham. For around 10 quid more than the godawful Travelodge down the road, a steal.
