Here is our report.
I concur with most of what was said by Kimo above. We spent 4 nights redeeming LEMFN, family of 4 (2 small children). Big thumbs up for the hotel for accepting us 4 in one room (2 dbls) which unfortunately in Europe is still the exception.
The hotel is in the beach area of town, so a 15-20 min walk to most points of interest. The number 6 bus in front of the hotel gets you everywhere you need to go, is clean, efficient, frequent, and cheap (10 rides for 6 EUR). You do not need a car, you can discover the coast by bus and train comfortably (but easier so on the French side, Italian trains are pretty nasty). The hotel is beachfront, we had a sea-front room, with beautiful sea sounds at night. There is a decent beach (somewere between sand and small stones).
Slight disappointment with our room, we were pre-confirmed for upgrade to Exec-level (10th floor), and when checking the website we expected one of the 'New LEM style' type of rooms, but received a classic one instead. The modern ones are referred to as 'Premium' rooms in the cristal towers. However, we had a nice balcony, whereas most of the Premium rooms have none. So with few exceptions, you can either have a modern room, or a balcony. There are only 4 suites in the modern part, most of the Junior suites are classic style. All suites have a king bed only. Our room was classic, average size, small but functional bath room with Cinque Mondes amenities.
Staff overall very friendly and competent. The seem to cater to a lot of conference groups, they kept the hotel busy.
Outdoor pools were closed, and so was the beach (Ok at this time of year, but still we would have appreciated a note on their website). Fitness center is average, saunas within the changing rooms, small. Indoor pool not bad, unfortunately during our visit there was some problem with the temperature control and the water was pretty cold (too bad as the weather wasn't great).
You do not expect Monte Carlo to be cheap, and the hotel certainly does not disappoint to that effect. yes, the Corona from the mini bar is 13 EUR, and the cheeseburger is now at 27, plus 6 delivery charge. Have your suit dry-cleaned for 26.
We went for breakfast buffet on day one. OK selection, but not great. Some items you may expect but not there: Parma (or any other raw) ham, smoked salmon or any other fish, actimel or yacult. The scrambled eggs looked like a soup, so I asked for freshly made eggs, and they said those would be charged extra. At 33 EUR base fee for the buffet, my appetite vanished. We did not try the restaurant again, as there are plenty of food options nearby (there was excellent pizza at the Spiaggia beach cafe next door).
For whatever reason we were not charged for the breakfast upon checkout, even when telling them that we did have it. I am not sure whether this was a mistake on their end, or a Plat benefit. There was a huge group checking in at the same time, so the agent simply did not bother.
Overall, a pleasant stay in a decent hotel, with only minor hickups. Would have loved to stay in a more fancy room/suite, but none of those comes with 2 double beds.