Quiet (ask for a non street view), clean and simple.
Not the most Moscow trendy hotel but a good value for money.
Was a Sofitel a long time ago.
Service is slow and not very efficient but there is not reason not to enjoy your stay at Iris Congress.

Nice hotel, quiet rooms, nice ambiente, competent stuff.
Even an Early bird breakfast at 05.00 AM with ham and eggs, fruits and other things was possible.
An ordered taxi at the Buisiness Center was just in time and in pretty good condition.
But you have to be aware : the next Metro station is 5.1 km as the bird flies away !!!
Price was worth it !

Few things you might want to know:
- The hotel is nice, rooms are good and clean and breakfast was good as well
- Helpful staff, fluent in English
- May take about an hour or more to get to town; it's 10-45 minutes on a bus (no. 191 or 194) or a taxi to the Petrovsko-Razumovskaya Metro station (line 9), and than another 20-30 minutes ride. I did it without knowing Russian but it takes some street wise.
- The hotel is located uptown; coming from Domodedovo airport takes 2-3 hours in taxi, depends on traffic...

Overall: good value, but if your business is in down town one might consider paying more and having a better location

Horrible service. Treated like they were doing us a favor by staying there. Water was brown. Entered room without knocking or permission on several occations. Waiting staff, reception and managment never said "hello" or "thank you" after breakfast, lunch or dinner. We did not feel like welcomed guests. Room service food was delivered cold consistanly. Had to change rooms because water running freely from taps. Water came pouring from celing in dinning room. They offered no apology and just said go back to our room and they will bring food to us. Never once did they apologize or say thank you. This hotel only wants your money and offeres HORRIBLE SERVICE. Shame on managment.