I stayed in the hotel comercio for the worst seven night in the histroy of bed times. For the frist three night I couldn't get to sleep due to the noise. The breakfast was bad. If you go to Barcelona don't go to this hotel stay anywhere else. And when I go back to barcelona I will not stay in this hotel.

Mary Dublin

Wow, what a disappointment after a long flight when all you want to do is get to a nice room. The room we recieved had two "twin beds". Not used to sleeping like Ricky and Lucy Ricardo, with my husband.
We were afraid to get to this hotel too much after dark..it is in a bad area..lots of homeless people hanging around outside.
The front desk looked old, dark and bleak...turning in our key every time we left the room got old real quick...the noise didn't bother us..even though this hotel caters to teenagers...don't bother trying to sleep in...the breakfast is bad...there really is no other word for it....stick to the bread and juice...the room was clean enough..but I felt like the floor was greasy..bring a pair of flip flops...last, I almost fell down the stairs trying to get my luggage through the narrow halls! Be careful

The room was very small but clean.

One night it was noisy, so bring earplugs!

Breakfast was basic but enough to get you started.

Hotel was located next to Plaça Reial and La Rambla.

For the price I paid and the good location I would recommend it.

BREAKFAST: OK. It's a semi-continental self-service breakfast: coffee (instant, I believe), tea, orange juice (nope, not fresh), cerials, croissants, breadrolls, butter, jams and (fruit) yoghurt. That's an improvement compared to the situation in 2000 (when a bossy, only Spanish speaking, woman 'asked' "¡CAFÉ!").
ROOMS: TINY, but you have your own bathroom and it usually includes a shower within a (small) bath. The balconees are so-called 'French balconees', meaning that nothing more than the two front legs of a chair fit on it. The room had an air-regulator (or something like that), but it did not work. For fresh air, the balconee-doors should be left open. With the noise (the hotel is situated between the Ramblas and Plaça Reial) this is not an option at night unless you have ear-plugs...
So yes, the NOISE: Isolation is what this hotel lacks of. And especially when students-on-a-school-excursion are staying in the hotel (as in our case). The doors have such heavy locks, that trying to gently lock your room is a 'mission impossible'. Rather unfortunate when arriving in the hotel after a nice night out (as did the students). We could - sometimes literally - hear people talk in the room next to ours. It's really difficult to walk in the corridors without making noise, especially when wearing high heels. Nothing I, nor the students could do anything about, but it's noisy...
Since it's a one star hotel, the price is nice. This of course is also attractive for (high) schools that plan school excursions. Combined with the lack of isolated walls (really, paper thin), I don't recommend this hotel to anyone who can afford a (at least) two star hotel.