Halong Bay Vietnam with Signature Cruise

First time visit Vietnam and very one told me do not miss Halong Bay, we searched some cruises and got good price at this site: http://www.bestpricehalongcruise.com/signature-halong-cruise-2-days-1-night.html I would like to hear your advice about this cruise, any comments ? So many cruises in Halong Bay for us to choose