Pros:

• A useful app who offers great finds to save and pay at a lower price
• Great for family, friends or groups
• It seems reliable coz you get confirmation upon payment and you can present in a discounted price based on the reservation you've made
• Reward for referrals and also beneficial if you want to use this as a gift.

Cons:
I haven't seen any, would probably try this out! Such a great hunt you've provided!