My partner and i stayed here for one night in an executive room. Room was nothing special. Breakfast in the executive lounge was poor, understaffed, dirty plates, broken coffee machine, waited too long for food to be replenished due to lack of staff. I was not impressed at all, we usually stay at the neighbouring Glasgow Hilton which is far superior to this.

I stay once or twice a month on business and have always found the staff terrific and very helpfull. The rooms are small compared to some countries but the beds are HUGE! and the rooms are always very clean although the chamber maids all seem to originate from Poland?
The hotel has excellent pool and fitness facilities and is often empty. The pizza in the hotel is better than most. The concierge service is wonderfull, always ready to help with the bags and full of ideas for days out or bookings.
The location of the hotel is right next to the M8 motorway, 10 mins walk from Central train station and the main shopping areas. Easy walking to main attractions and very resonably priced!

In Glasgow on Business in April this year and stayed in the Marriot for 2 night (sleepless as its right next to the M8 and I couldn't close my window!).
Check in was a farce, first they didn't have our booking then checked two people in the group into the same room (they met each other as one was coming out of the shower and the other entering the room!).
took a couple of bottles of wine out of the fridge in the room to put a bottle of water in and they tried to charge for the wine which was sitting on the top of the fridge unopened!
Dining room and seating area in reception was quite nice but still didn't think it was 4 star standard.

I regularly stay in the Glasgow Marriott on business trips while I am in Scotland. The hotel has the perfect location only being minutes from the M8. Rooms are what you expect from a typical Marriott: spacious, clean, all the facilities you need and a whopping bed. The staff do all they can to make your stay an excellent experience. The health club is also good. The pool is a decent size and you usually get it to yourself!! You can relax in the steam room then crawl back to your massive bed and sleep. Previous reviews complained about the sizes of the rooms. I have stayed in a twin and double and all are good size. Room service is also prompt and easy.

All in all the Glasgow Marriott is a quality chain of hotels and I have stayed in them all over the world and am yet to be disappointed. I would definitely recommend this hotel and look forward to my next visit.