Mine measures indoor humidity and temp
Outdoor temp, humidity, pressure, rain, wind direction and speed.
The software tells you trends up or down of everything, ie temp falling x degrees per hour etc.
Rain rate/hour, peaks, totals, daily, monthly yearly totals, graphs for everything you can think of, dewpoints, windruns, etc etc.
I can't think what else you might want a weather station to tell you.
I dare say the £500 versions are super accurate but when does 0.1 degrees C actually matter?
I have mine permanently connected to an old notebook, set to reset itself in the event of a power failure. It is permanently updated to the internet.
Even have an app on my phone that tells me what it is doing, or go on any pc in the world and look it up.
You don't have to do that, you can plug it in once a week and download the data if you want.
It is a good start and after 3 years I don't feel I need one that costs 10 times as much.
Each to their own
I'm testing a couple of cheap wireless stations at the moment. I'll let you know how I get on.
Basically the technology for these things has advanced rapidly in the last 5-years, and now even the cheaper units perform really well. I'm pitvhing these against my official gear, so I'll let you know how it goes.
Simon