Used the app a few times to book rooms in the UK & USA.
The latest update however, appears to have some serious flaws. For example; I booked a room in Newcastle, clicking on a rate described as ‘Summer offer’ (or something similar). At no time during the browsing and booking phases did it state that this rate was a pre-paid non changeable rate. Even the booking confirmation failed to notify me.
It was only when I went into my Hhonors account on my PC, with a view to making a reservation change, did it state the ‘rate rules’.
Beware or you could quickly find yourself out of pocket.