I decided to get one because it seems like a fun gimmick that'll be a novelty for a while and wasn't as expensive as I thought it might be. Dunno why but I thought something like this would come in at around £200, bearing in mind how much a reasonable wifi/bt connected speaker costs on its own. If the national rail integration works well it will also be useful in the morning to avoid faffing about with a phone app.
The reviews I read seemed generally positive about the voice control, I'm a bit of a sceptic and expected it to have problems letting me choose what music I want to listen to. If I can just bark out requests to play a specific song or album name by a specific artist and it works properly, then I'll be happy.
I also can't find the charging cable for my existing bluetooth speaker.