Given this is a US based site, the discounts are better in the US however the AU hotel prices beat everyone else. It's always best to check between the comparison sites, the hotel websites directly, using coupon codes for hotels.com etc, or by calling up the hotel to see if they can beat the best prices. The travel wiki has some good tips. Also, note that your referral credit can not be combined with this coupon code.
I've used Travelpony once for an emergency hotel booking in Hawaii back in March with no issues and great price.
Example bookings I tried:
Melbourne, Crown Promenade, Aug 23-24
Wotif - $518.00
Hotelscombined best price $472
Travelpony 20% off code - $316 USD or $340 AUD
Cambridge Hotel, Sydney, Aug 23-24
Wotif - $209
Hotelscombined best price $151
Travelpony 15% off code - $131 USD or $141 AUD
DoubleTree by Hilton Los Angeles Downtown, Aug 23-24
Wotif - $222.43
Hotelscombined best price $193
Travelpony 15% off code - $172 USD or $185 AUD
Boston Marriott Copley Place Aug 29-30
Webjet - $271
Hotelscombined best price $241
Travelpony 30% off code - $197 USD or $212 AUD
Again, Travelpony won't always be the best price so shop around.
via Dealswelike
How long did it take to get to Hawaii by Pony? Quicker to fly?