Id advise to not book on Bestjet.
http://www.australianfrequentflyer.com.au/community/your-questions/is-bestjet-reliable-68282.html
I have booked no less than 8 successful international trips on best jet for family members with no problems. I myself have used them for a price beat. I do however acknowledge some average reviews. I guess time will tell if they are as bad as some are saying.