Worse experience in the life time. AVOID AT ALL COST!
I've subscribe the service for more than 1 year, and establish with lots of reseller plan.
Without any valid reason, without any warning, they will just block your account from access. Never explain what you did wrong. All your client will suddenly bombard you with complain why their email is not send out. That is how they will screw up your business!
RUN CHICKEN RUN!