Install a Roblox Parkour's Modpack server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → Roblox Parkour's Modpack)
I haven't had my server for very long so can't give a full 5 stars but so far, I've had no lag of any kind. Everything has been easy to set up and I cannot fault the experience.
Only time will tell as to whether or not I'd recommend this company but so far, it's looking promising. (I've not even had my server for a month yet)