I have been using their service for several years now, we recently moved our website from one provider (in Europe) where they are very expensive but also not fast enough anymore with caching enabled etc., over at belugacdn there is no such thing like "bad" performance in my experience - everything always works just fine! And what's more important if you need assistance during an outage or something similar then support team will help out immediately without any hesitation which really makes me feel comfortable about being hosted by them here :).
The only downside could perhaps because of different countries laws regarding privacy issues i am limited somewhat when working remotely sometimes even though all communication between us would stay within VPN tunnel :) But overall nothing negative mentioned yet! Very good value/price ratio compared other providers available today ;), great customer care both via phone + chat / ticketing system;-).