Prices increases and tickets no longer available
I tried about 20 times to book flights, starting in Skyscanner going to trip.com; many times the price increased by a small but material amount immediately on joining Trip. Most frustrating was that all but the last time, at some point in the booking process it would abort with the message that the seats were sold out at that price. Sometimes within seconds of joining Trip. Prices were too volatile. After a lot of frustration I eventually got through the process at close to the price quoted the first time I'd tried. But very hard work and very hit and miss.