Site5 used to be a very good host but that was until the orginal owner sold it to Endurance International Group who by up a lot of different webhosting companys and make them rubbish. Site5 servers are extremely slow and even small time wordpress sites can struggle to load fast on site5 servers.
When I hosted on site5 the server that my site was on got hacked resulting in malicious code and files being uploaded to my website. I only realized after noticing the files in the ftp. I alerted site5 who didn’t apologize but fixed the whole eventually after a month. I eventually got fed up of my site loading super slowly and migrated away.