I wouldnt count on the too much. 3 out of 4 of my segemnts on my last trip were '0ed' and all 3 took on SBYs

So by all means go for it! but just keep in mind its getting harder and harder to actually get them. Also make sure you do your homework and know what other options might exist on CO and other Carriers, if everything is sold out for that same day and the next day it could be awhile till you make it back. 2 yrs ago I ran into that and the 1st op wasnt an op for me , so I skipped the VDB and flew out.