Our family spent a few days at the Guell Apts - we stayed in apt #4- As others have mentioned, the location is great. Very close by to La Rambla and many fine restaurants/bars etc. We found the apt to be fairly clean and functional, and no noise issues. Keep in mind that this isn't a 5 star hotel- Yes the floor plan is a bit unique, as the 2nd bedroom is really part of the living room, but has a partition wall dividing it, and yes the bathrooms are small but, again the location is great.
Two items for feedback-
1-There is no Wi-Fi capabilities- this is really inconvienient for travellers
2-We fond the beds to be extremely firm (in other words hard as rock)

My clients stayed at the MH Apartments Guell in Barcelona for 2-nights (Sept. 23-25, 2011). They said the apartment was in a great location within the city and quite close to the cruise port, but that the area was extremely noisy. The apartment entrance was on a busy street, and it was hard to get to sleep at night because of this. The only time a representative from the apartments met them was upon check-in, and they were quite disappointed that they were never checked-up on. The apartment itself was quite nice however - very nice decor and comfortable rooms. Please be advised that to check-in at the apartments, a meeting has to be set up between you and one of their representatives prior to your arrival.

I've stayed before at the MH Opera Rambla Apartments and was not disappointed there, but this MH property was way under my expectations. The living area was rather cramped and the apartment was not very clean. The floors were dirty and dusty. The sheets in the main bedroom were stained and the comforter appeared to not have been washed between guests. Won't be staying there again. Positives were: very centrally located and very nice MH Apt. employee to meet us to deliver keys.

Very modern spacious clean apartments in a fantastic location just off la ramblas stayed twice now and would stay again. Everything is literally on the doorstep