This one is very tempting but there are LOTS of things to PLEASE think about before you pull the trigger. You are NOT buying at Delta.com but KLM.com. You should get full credit per Delta.com for Z and other biz fares this seems to be pulling but know you are booking on KLM.com and you should check the fare class against the Delta.com pages. There are many other places if you search around you could go. This is a great fare for business class. You can look at flying KLM, AF & ALITALIA. Here are the details:
Cost $1300-1400-ish in business class
Bookable on KLM.com (you can put in your Skymiles number for credit)
Open many dates this summer and fall
16,000+ MQMs & tons or Skymiles
CPM ranges from 7-9CPM
This one is work a look. You can scan this FT thread for more info and there really is to much to put in one post.