Haven't used them, but if the more limited frequency range is viable, they've certainly got a name in the industry and probably have a perfectly serviceable power sensor.
That said, two things:
Anritsu has some USB power sensor options, don't know what price is like, but they could be another competitor and have been doing power sensors for decades.
Keysight does charge for their BenchVue license, but newly purchased sensors from them come with it for free (at least, so claims their product page for some sensors). It's something like $135 for a license otherwise, and there is a free utility at least for the U200X series sensors called "Agilent U200xA USB Power Sensor Virtual Panel" which is available for free to download from Keysight. Don't know how wide the support of power sensors is, but it's responsive and pretty comprehensive in terms of instrument control. The UI looks less polished and I'm sure it lacks some more advanced analysis functions, but as a basic power meter with full control over instrument settings, it does work and is free.
I don't know what BenchVue looks like, but I've got an NRP as well and do like R&S's software for it - though the asking to save a log every time I close the program is tedious when not meaning to log anything in the course of its use....