Proactive, solution-oriented, friendly. Machines can all be within a fraction of each other's performance, but it is the people that make a place shine. I have websites older than WPMU and have hosted everywhere from solar-powered boutiques to AWS instances. Everything else being equal, service always makes the difference. But at WPMU it is not equal. I subscribed to their plug-in suite and even though I had my sites spread out through several hosts, it made my life much more manageable. Sucess there led me to investigate their hosting services. I am in the process of moving 10 sites (4 client, 6 mine) ranging from real estate, home rental, and teaching sites, to ecommerce. Their support in archival mail migration (they have an app for that) and overnight site relocation (via FTP) makes a scary road very well lit.

The Live Chat support is fantastic. They usually go above and beyond to assist in more complex matters. The only support I have experience that has rivaled this was with WP Engine's Enterprise plans, but WPMU DEV is a considerably cheaper alternative with a more rounded and always expanding service offering.

Para uma pessoa não técnica como eu, que trabalha com sites, a equipe do WPMU tem sido útil com tudo, desde a clonagem de sites até me ajudar a resolver problemas de DNS.