Just got back from a 2 night stay. I've done the Westin/W/PdG/LM in Paris before so this was quite a change
As noted above, very nice boutique feel. Champagne bar is a lot of fun (but quite pricey). Got upgraded to a suite on the 6th (not the Eiffel). Nice neighborhood. Very accommodating staff.
But...I think I'll either return to one of my core options, or maybe a new Design one going forward. I just need a bit more when it comes to creature comforts (like a gym, and a fuller breakfast, and a bit more space, and more elevators). Not judging this property for the lack of those, just my personal preference.