3.5 stars, really. Blanc Guesthouse was a cute urban B&B. (Or like the nicest hostel in the world.)…read moreWe stayed there for 3 nights and were pleased with the cleanliness and comfort, as well as the amenities (free breakfast & internet) and friendly staff. The decor was modern but comfortable (lots of things from IKEA, including a lamp we also own!), and sharing a bathroom with one other room was no problem.
The only downsides, I would say, were that when we came in late (11-ish) we felt the need to whisper, in case we disturbed other guests, and that the nearest Metro stop (Diagonal) was a 10-15 min walk, depending on if you were lugging suitcases or going for a leisurely stroll or what. (But then again, all of Barcelona's Metro stops seem farther apart than Madrid's, so... yeah.) On the other hand, there's quite a bit of nice shopping nearby, and good eating, and Gaudi's Casa Mila (La Pedrera) and Casa Battlo are relatively close too. We even walked to Sagrada Familia (once; we Metro-ed it the second time).
All in all, we were satisfied with our stay at Blanc Guesthouse and would definitely consider staying there again if/when we return to Barcelona.