Just checking in for peace of mind, as it's the first time I've used Agoda.

I waited just a day too late to book the 137 Pillars in Chiang Mai for December, and the "basic" suite was suddenly sold out on its own website. Agoda, however, had one left, which I promptly booked. I haven't used Agoda before, so I was a bit nonplussed to get an Agoda voucher for the hotel rather than a hotel confirmation. Are we going to be ok when I get to Chiang Mai and try to check in to a heavily booked hotel?