Cons: Kayak allowed us to book a flight that was impossible to make. We had two separate VietJet flights (one from Da Nang to Hoh Chih Minh and the other from Hoh Chi Minh to Bangkok). When I booked through Kayak, I searched from Da Nang to Bangkok so I thought they were booked on one ticket but they weren't. We had to get my bags in Ho Chih Minh and completely re check-in for our flights to Bangkok within a 30 minute period after deplaning. Luckily the flight to Bangkok was delayed and we had a nice counter representative that bended the rules and allowed us to check-in after check-in had closed but this was a very disappointing experience with Kayak. The representative said that had we booked through the airline website, the system wouldn't have let us knowing we didn't have enough time between flights to get our bags and re-checkin. I would think that Kayak would know this.