Is Cancun-Discounts a legit site?

[Jenna]

I wanted to book the Chichen Itza by air - about a year ago Royal had it through them for about $480 a person but I waited too long and now the price is around $680 and doesn't look like it will ever go down. Although I like the peace of mind booking through the Cruise Line gives, I really don't want to spend almost $1,400 on one thing. On Cancun-Discounts they are offering it for $420, but I obviously don't want to buy it if it isn't legit. Has anyone used this website before and can give their experience?

Thanks!