We have tern gsd and can only recommend it. We regularly take it with regio train to go camping or do bike trips, the size is the upper limit by db rules but so far no complaints by train conductors.
The weight can be disadvantage, the bike is quite heavy. Also do buy belt version, you do not want to mess with the long chain. Front basket with a euro crate is awesome and a lot of 'stuff' will fit in. If you use ortliebs, they must be modified to be able to fix the hook to the frame.
I see them a lot and I mean A LOT here in Berlin, it's very popular bike for a reason. But muli is also a nice alternative you may want to consider.