Superonline is the largest ISP in Turkey (over 1M customers), now we started also VoIP services.
We purchased Alepo few months ago and we are happy.
It cost less then Mind-CTI and is better, IMO, for classic VoIP. I never looked at the other products you listed.
It serves 40 E1 now and we will grow to 100 E1 soon.
The product does what Alepo said it would. I don’t know much about the support, we used them for initial setup and never needed to call them since.