Flight Booking/Travel experience with FareDepot(via Momondo)

Since this is my first time booking with OTA(online travel agency), wondering how was the overall experience of other folks booking similar in past, considering below:- 1.)Seat Booking Preference (bassinet for infants) 2.)Flight Cancellation 3.)Overbooking 4.)One leg delayed, causing other flight rebooking/cancelled. Flight: United Airlines(Operated by Lufthansa throughout) Scanned googleFlights, skyscanner etc., but couldn't find better deals compared to FareDepot/Momondo. Pros:- Price is cheaper then airline website.