Rip Off Prices
The prices are extortionate. They charged almost double the face value of the ticket for a Korean high-speed train. They also took a very long time to actually confirm the ticket. It would've been easier, and a lot cheaper to just buy the ticket at the station. I can't remember why I ended up using Rail Ninja for this trip (maybe directed via the official Korean Rail site?), but I'll never use them again. Edit - Because of this review, Rail Ninja got in touch and have refunded the difference between what I paid and the face value of the ticket. This is very much appreciated, so I've added a star to the review, but won't remove it since they should simply not have been operating in this way in the first place. It also doesn't address the fact that they're using slightly underhand methods to direct you to their site, such as having multiple "official" looking web addresses which appear at the top of Google searches. By all means, pay Google to put your website at the top of the page, but don't try and trick customers into thinking they're using an official ticketing channel.