I went to Les Dalies Apartments with a group of friends. Overall we had a very pleasant stay. The apartments are in a good location, close enough to quickly walk to all parts of Salou (beach = 10minutes walk, portaventura = 25mins walk) but far enough from the hustle and bustle so as to get a good nights sleep. The pool area is slightly on the small side but it was perfectly adequate for the amount of people who were using it. The apartments were very clean and modern throughout. The rooms are a good size and clean. My only gripe about the rooms being there was only a mirror in the bathroom, none in the bedroom.
Our only major problem with the hotel was when we arrived at 1pm there was no one available at reception to check us in and no note to inform us when we could expect a receptionist to return. This was dissapointing as we had been up since 3am that morning and just wanted to get to the room to unload our luggage! The barman was able to help us out and I talked on the phone to the receptionist. She explained that there were "exceptional circumstances" today due to someone being off sick and that no-one would be in reception until 5pm! I felt that for an advertised "24hr reception" that this was not good enough! Apart from that the staff were helpful and very friendly and the reception did appear to be open 24hrs for the rest of our stay.
As others have mentioned there is a €150 deposit, this is steep but providing you follow the instructions outlined at checkout there will be no trouble getting this deposit back.

In concluding, if you are thinking about booking Les Dalies, go for it! It's nothing special but is very good value for money!

Nearly all of the staff were very friendly and helpful except one or two.
Charges for the security boxes a little expensive at 5 euros a day so we opted not to get one and were fine. The maid came in most days and nothing went missing.
The hotel is very new and clean inside, when looking around at some of the others i was glad we had booked this one. (No 70's decor.)
The pool was a little small but clean and kept tidy at all time.
The hotel is just far enough away from the hustle and bustle to get a good nights sleep but near enough to walk to the beach in 2 minutes.
You cant hear what the people who are in the next room are talking about which was a bonus as a couple of other places we have stayed in you could.
I would thoroughly recommend this hotel to others dont be put off by other peoples reviews.

we had been up since 2am travelling and found the welcome at the dalies somewhat lacking apersonel touch. manager speaking perfect english took my €150 deposit and sent me on my way to find the aprtment.
it was very nice. ok so far, then i read the letter from them and found the tone of it somewhat harsh. it was on my mind all week.
there was a few times when i went down to reception and the manager whose english was perfect, refused to understand me when asking where a bus stop was, or how i could top up my mobile phone. she just said ask the rep in the morning. there was no information from the dalies about salou, and i felt the manager had complete contempt to the visitors, people who have possibly saved up all year for a holiday.
on the flip side the staff where very nice, i felt one or two where embarrassed by the manager.
in short their nice when giving money but for gods sake dont bother them with any problems, or questions they suddenly dont understand english.

Agree with everything said previously, but for what you pay for the stay, you cannot complain about emptying the bins and leaving the place clean and tidy. Very well run, very clean, family friendly, quiet, very friendly staff, quite good location about 10 mins leisurely walk to the beach. On our arrival we realised our Air Con was not working. They had an engineer in our apartment fixing it within an hour. Later during the week a bunch of spanish drunken louts invaded the place shouting, singing, throwing stuff in the pool. The lady in charge dealt with them very promptly. Don't know what she said, but whatever it was they were quiet as mice within minutes and tidied up the mess they created and were never heard again. I was impressed with how keen they were not to tolerate this kind of thing. The only negatives I have to mention are the size of the pool and the fact that it is shaded until about 2:00PM (this is in July). The other thing I have to mention is the fact that the apt sleeps 4, but 2 will be on the couches, which wasn't a big deal for our kids. They didn't care as they were usually very tired after long days having fun. I have to say, I would go back to Les Dalies again. It's not the Ritz, but it's certainly all you need for an excellent price. If you can live with the very minor negatives, this place is well worth it.