I can't get iOS 8 self sizing cells to work with the default cell style UITableViewCellStyleSubtitle and numberOfLines = 0. It seems that only default cell styles with multiple labels have this issue. The basic style works fine.
Here is sample project demoing the issue: https://github.com/stevemoser/SelfSizingDemo-DefaultCellStyle
Original code taken from this blog post that uses a custom table view cell: http://www.appcoda.com/self-sizing-cells/