Megaport are a workhorse; our needs were quite simple - connectivity between two cloud hosting companies. The Megaport UI was straightforward and easy to understand, the price was right and connecting their service up to each of the hosting providers was straightforward. We get clear notification in advance of any maintainance work and the support from the account team has been great. In particular, identifying the HA connections at each step through the connection means we're less likely to be hit by maintenance outages. Review collected by and hosted on G2.com.
The web UI means it's sometimes a bit trickier than it needed to be to see traffic, but that's on our scale where there's only a couple of connections - I'm sure once there's more interconnects, or where you're in the console a lot more would make it more intuitive then. Review collected by and hosted on G2.com.