I've noticed almost nothing PWS related is Plug it in and go. I am open to other brands but Davis seems to be the leader in the PWS market.
So I own a couple of non-Davis PWS. I have a WS-2080 (no longer sold but you can find them still in the box) that would be plug and play with the addition of the $40 meteobridge. I also have a WS-1400-IP that is totally plug and play but only supports Weather Underground. That's a bit limiting for me. I'm also having some issues with the way the anemometer works on the unit. I'm expecting a warranty replacement sensor unit on Friday. If that one doesn't work better, I'm going to return the unit for a full refund.
I'm going to purchase a Davis VP2 even if the new sensor unit works better. The Ambient Weather stations are just a bit too consumer for my liking. Davis takes things more seriously and the units seem more serviceable when things break, and they will break. Weather is harsh.
I've been at this for a few years so if you want to follow my lead I'm getting a VP2 6152, the daytime FARS 7747 (not necessary but, I want it), the USB Datalogger 6510 and the TL-MR3020 I mentioned in a previous post flashed to become a meteobridge.
This setup will not require a computer to post to any of the services (weather underground, CWOP, or others) and will be far more accurate and reliable than the stations I currently have.
As a side note: I don't like relying on a computer to post my weather data. I work in the IT world and have a pretty hefty lab at home. Having to keep one computer running all of the time and be careful with upgrades to the os and such so as to not interrupt my weather data is a pain. Having a device, the TL-MR3020 appliance do it will mean my data posting will have far fewer gaps in posting and I don't have to worry about software upgrades or licenses needing to be renewed.
Just my .02 cents. Others are welcome to disagree with my opinion. But, remember by definition an opinion cannot be wrong, just different than yours.