Rewards from hotels I find can be very hit and miss, and even booking on the QF Hotels website is no guarantee that the rate will qualify for points - let alone ensure they're awarded correctly, if at all.
Of the hotels booked on the QF Hotels website, all of them have failed to award points. Two others booked directly through the hotel's own system have also failed to award. This is really an easy fix, as I just scan the guest folio and email it to the QFF/QP service centre who chase it up and ensure the required points.
Sending the folio along always pays, and sometimes overpays. During a stay last march at Vibe Carlton, a four night stay (booked as 1x 3-night and 1x 1-night) that wasn't direct credited ended up scoring me 2x the bonus points being offered by QF Hotels, as they'd misread the conditions for the offer when awarding the missing points.
However, it can always go the other way which can balance things out. The most annoying of these situations was the Carlton Crest in Brisbane back in 2006, with two stays there booked through QF Hotels and no points awarded.
Did the usual scan and email, and the hotel came back saying not a qualifying rate - despite there being a clear indication on QF Hotels that they property was a QFF earner and that the rate was eligible for points.
It was a significant folio as well for three nights, so I made a point of following up with QFF and escalating through the chain - particularly since QF Hotels gave wrong impression or hotel was trying to shortchange. Ended up getting 600 odd points as an apology.
With any hotel bookings - you should always consider how many points are earned from the stay if you earn direct to QFF, or earn in the hotel's own program and then flip the points to QFF where available. This is particularly important with properties/chains where the amount of points earned is a fixed amount per stay.
An example of this is the Hilton. With promotions and bonuses, and depending on your room rate - it can be worth signing up to HHonours to earn the points there, then flipping them to QFF. My recent ADL trip yielded 3x the points by going HHonors->QFF, compared direct to QFF.