We stayed here at the beginning of September 2008, whilst attending a congress at the Nuove di Fiera centre near the airport.
It cost about 30 Euros to get there by cab from Fiumicino, and be sure to print out the address, as it's new and many cab drivers don't yet know the name.
The hotel only opened a few months ago, and it still looks and feels new, with a high standard of fixures and fittings. The lobby is nice, the staff extremely helpful. They took in courier deliveries for us and stored everything in their offices for our arrival. Check in was a touch slow, but was friendly. The lifts are nice and quite fast.
Rooms are nice - they have single rooms at reasonable prices, helpful for business travellers - as well as double and twin rooms. Some of the rooms have nice balconies. Air con works well. Everything very clean.
Breakfast good - self service and loads of choice.
The meeting room that we booked was excellent - nicely furnished and a good size. The food was good, and staff were helpful about bringing more drinks etc. However - the kitchens are only open until 11pm, and after that it's impossible to get any more drinks or snacks, not even water - we ended up raiding our room minibars for coke, water and crisps when our meeting went on late.
Only one area where they really need to improve - internet and business facilities. The internet is advertised as being fast - it's NOT. It's extremely slow, so you can barely access hotmail, never mind download files or access virtual desktops. And they don't have a business centre, so no photocopier, no printer, no paper, no envelopes, no CD-Rs, nothing - you'll need to take everything you need with you. During normal hours, staff were helpful with providing sellotape and paperclips, but that's about it.
Although I really liked it as a hotel, I'm not sure I'd stay again - the metro stop is 10 mins walk away, so you can get into the city fairly easily (or 15 euros by cab), but you feel really off the beaten track here, so it may not be ideal for tourists. The nearest ATM is a half hour walk away, or in the city. And without good internet, it's not really ideal for business travellers. And it's not especially close to the airports either, so I'm not really sure what clientele it's aiming at.