The customer service is amazing, they are always available to help you with anything that comes up in your process of signing-up for their product or platform! Nothing really as I have not encountered any problems yet but this does happen sometimes when trying out new software/platforms so be prepared if something goes wrong (which it rarely happens). We use them mainly because there's no other option at hand which we can trust regarding our data security requirements - GDPR compliance etc., however since these services do exist elsewhere then maybe go through those options first before using another provider? As mentioned above though; great people working here who will assist wherever needed during signups & onboarding processes!!