Worth a trip if you are in the area. We stopped in February and since it was windy, the geyser was spraying water in every direction! Kind of funny, but prevented us from walking anywhere near it. It is in a very quiet, remote spot and often, that can make it an enjoyable experience.
We happened to see a train going up the 'loops' and have to say it was quite an impressive show! Would make it worthwhile to sit and watch the trains, but we were told the trains are not very frequent.