Started of well with initial booking and deposit, Collection of information for the trip through the portal was a little rough as the Tab key which normally advances to the next field just flipped you to a random area on the next person. Then asked a question through the portal about address for the first hotel so I could complete on line visa and got a decent answer in 24+ hours. Then asked about making a change to extend from an included 1 day to a 3 Day pass for Angkor Wat in Siem Reap and silence for days. Should be an easy an incremental price from $37 USD to $62 USD. Was hoping to try and use Tour Radar Credits to cover increase. Asked again if anyone was even going to acknowledge or eventually replay and still waiting for a single response, going on a week and still silence. The Chat option seems to be the best choice and my experience with it was good. Eollow up email with promo code was also a nice touch. Will revert back to Chat if i don't get a reply soon. Deposit transaction went through as expected.