This server is actually my favorite server, not just in Tekkit, but in all of the other servers in Minecraft in general. This one by far tops them all by 1.) The community is quite friendly, 2.) They try hard to make the best experience for everyone, and 3.) If a problem does occur, they work hard to fix it right then and there. The only possibly bad things is that sometimes the TPS (Ticks Per Second) drops majorly, but it's usually fixed when the server restarts. Other than that, I see no problems in this server, and I'm glad to be able to play on it.
