not very impressed with the sense early bird roll out. i got the email yesterday about the sale and have been on the site and can not add to my cart the pages keep timing out. i want to buy another starter kit and 4 sensors.
I suggest you file a support request for this. Or you can try this number (844) 999-3226 Monday-Saturday, 8am-4pm PT.
Apparently this is resolved. See here: