Hi
Stayed here for 2 nights last week as a Spire member. I was offered vouchers or points as usual but chose the vouchers as they offered us 2 (never known that before) but I still got the 600 welcome points credited as well. I was staying on a UK credit card free night and for the 2nd night I used the free night from the recent UK offer where if you stayed 2 nights at a Principle hotel, you got a free night anywhere.
On checkin, I had already been upgraded from a standard room to the Sky view corner room - decent enough (avoid the extortionate mini bar prices though!). Overall, was quite pleased especially considering both nights were free nights and I'm only Spire, not Ambassador.
Steve