Review for Grand Sierra Resort and Casino (GSR) Review For Grand Sierra Resort and Casino (GSR) Google User Mar 28 '16 at 18:55 dont go here. and dont book thru their website, it is operated by a 3rd party vendor that took over 20 business days to refund me for a room I cancelled. If you see anything from Zoomaway its too late, this is the 3rd party vendor. terrible they spent all that money on renovations for the worst customer service experience i have every received at a hotel or casino, and i travel frequently. This place casino will be out of biz in the next 1.5-2 years or under a different ownership hopefully. View full site to comment or like