Sessions had a promising future. So I max tiered. It has become heavily integrated into our daily operations for the last 11 months.
Early warning signs of the eventual failure were declining support (they completely stopped responding to messages early this year as the bugs continued to grow). Over-promised and under-delivered features.
Most disappointing, however, has been their allocation of funds. This team took their revenue from the AppSumo campaign and funneled it into another project (AR2R). That's probably why development stopped 6 months ago.
The discontinuation of Sessions is going to be majorly disruptive and makes me reconsider the quality of the other products on here too.
AppSumo should have bought this software and converted it into an original.