We very much enjoyed our stay at CSI Guesthouse. Our room was on the first floor. We arrived in the middle of the night because of a missed rail connection, but the manager answered the phone number immediately and buzzed us in the front door. Our packet was waiting for us with our room key, front door key, etc. The room was wonderfully temperature-wise. The view from our room window was pleasant hillside. The view from the kitchen window was of downtown Coimbra.
We walked everywhere; the University is uphill and downhill. The modern city is downhill from the University. The taxi ride to and from the hotel from Coimbra-B was about 8.5 euros each way, but we tipped the balance of the tenner.
I took a bus to the Roman ruins at Conimbriga for something like three euros each way. Those were fascinating.
It's a wonderful Portuguese hill town, set on the Mondego River. The wistaria was in bloom. The Torga Café - down the street, down the steps, a little farther down Rua Miguel Torga is delightful, and Duarte the owner loves practicing his English and delights entertaining you with his sandwiches, pastries, and soups.
CSI is a guest house. You'll need to manage your room's cleanliness; the kitchen has everything you'll need, really, to prepare and stash your own meals.
Wifi was quick and strong.
This is a good place. We'll come back.