I booked my tickets to cnblue concert 2013 via sistic, as well as to cavalia in August. The booking is quite simple since it goes by step by step basis. Look out for promotion by credit card or special groups such as safra and so on. Most of the times requires special promotion code to be keyed in to enjoy the discount or free upgrade of seats. Can select the seats in the category you want instead of letting the system decide for you. View the seat map to have a better view of where roughly you sitting. One thing I like about sistic is they do not charge extra to get their tickets physically instead of printing out ourselves. Though they charge a booking fee. Hence I can go down to their counter at various shopping malls in sg to collect my tickets, very convenient, and keep them as remembrance.