I used them once, and everything went well. I assumed they were the same as Kayak. Howver, 4 years later they charge for seat selection - something nobody else does- and cancellations - $50 per person domestic and $75 a person for international flights. They upsell you insurance, which is not out of the ordinary but they call you creepily after your booking making sure you spend more money on insurance and select your seats. Don't use them, go with literally anybody else.
Misha, sorry for the inconvenience of our sales team calling to add additional products. Many customer's don't realize the importance of having insurance for those unforseen situations that may arise, or just simply having a seat assignment which protects your from an over sold flight, and the airline not having a seat for you. We realize that some people may not want the added contact from us, there fore our apologies, and the feedback is appreciated.