As is often the case, the devil is in the details. With things like fiber, it is a good idea to ask about Service Level Agreements (SLA). Whether you can get an SLA with details will vary by location and state. If your provider has one, it will define what constitutes things like speed and uptime. If it includes language like "speeds up to..." and " best effort", it is a pig in a poke in my opinion. Around here, only a few providers are willing to define the service, and fewer still have any sort of remedy for missing the SLA specifications. Symmetric 200Mbit/s should be blazingly fast. Should.
All the best,
Peter