Jason....

I have a one night stay coming up before an early flight out of LHR in November. So I'll be curious to hear any report you might want to give.

I haven't stayed there myself yet, but Mrs. Cyberdad stayed there for a night last year with our daughter, who lives in London.

Both report it to be a rather standard airport Marriott with good...if slightly overpriced...food/beverage services. Generally good service and friendly competent staff. No upgrade, but they were staying on points, and probably didn't request one.

One thing they mentioned was that transportation in the immediate area between hotel, terminal, tube, HEX, etc. was a bit of a hassle and also something of a ripoff.