So far so good and really helpful support
So far so good. I migrated a large number of websites over to 20i when the Heart Internet service (my previous host) became really poor. I must say everything went smoothly and I was surprised at how easy the migrations were. We had a few issues with DNS records as a number of sites use Cloudflare.com as a CDN and as an SSL provider. It seems Cloudflare doesn't reflect any changes to the MX records made at the domain name registrar where the original DNS records were kept, so that's something to look out for when migrating email accounts over. 20i support team have been really helpful and responded to support tickets quickly.