@ PowPow - which Radisson Blu did you stay in? Dublin or down the country?
My OH and I stayed in the Radisson Blu in Cork for Christmas 2017 for 5 nights - great hotel - very modern, minimalist decor, attentive and warm staff and the food offering was pretty good. The swimming pool and leisure suite was good also - which is a must for me when staying in a 4 star hotel on a break away.
Personally, I think the standard of Irish hotels is pretty good compared with hotels abroad. Tea/coffee making facilities and an Ironing board in nearly all rooms of any Irish hotel I've stayed in over the past 20 odd years.
In July, my OH and myself stayed in the beautiful Breaffy House Resort hotel just outside Castlebar, Mayo to celebrate his birthday. Lovely 4 star hotel with superb service and a room upgrade to a mini suite which really made our stay there all the much better. I can't recommend the Breaffy more highly!
There are also some great deals available with hotels at the moment if you look online - I always use Booking.com for both international and Irish travel. Excellent, no-nonsense site.
The last hotel I stayed in was the Imperial in Galway city centre for only one night the week before last as I was down in Galway for the funeral of my first cousin. It was a three star and was so-so. Friendly staff but badly needed a bit of a refurb in places, food in the bar was meh and a party of youngsters was playing blaring, thumping music in their rooms till 3am in the morning. €78 for a Monday night for my room was very good value for a late booking for Galway.
I have a TripAdvisor account and do hotel reviews there. It's a good place to get honest reviews as many hotels just give themselves very positive reviews which skews the overall score on other websites.