The version 400 was allmost ok ... well... allmost... NOT perfect...
But when I upgrade from 400 to 900 it becomes a disaster...
I set it to send
first day 3 messages, at 3 different hours, from 3 users (each hour with his own user)
It was a total disaster:
First hour first user was send ALL 3 messages
Second Hour Second user send ALL 3 messages
Third hour Third user send ALL 3 messages...
Tested on all 3 sites .. same result...
I try to contact Sergey... Nothing ... no response...
So I switch back on older version 400..
Which are not perfect as I say... I receive some complains from real users that different users send same message...
I advise Sergey to create a posibilities and add this option:
Chose exactly What user send what message at what time... so make it simple:
Time to send/Mesage to be sended/sender/
Sorry for the bad review but after upgrade to 900 on one site with fully trust in Sergey skills and NOT verify what was happening... I spend 3 day's to delete the wrong messages from conversation_table in mysql...
Also a lot of users has lost credibility in one of my site after receiving all message from one user and again all message from other users...
(before upgrade I have set up 40 messages/40 users/40 day's)