Heya! So I have a Surface Pro 3 (typing on it currently) and I use the dock everyday.
I've not had many networking issues, but my bluetooth gets weird sometimes. It looks like it's the same chip so it could make sense how you might see those problems.
I type constantly and have never had an issue with the keyboard (I have the hard one, not the touch cover) and I have never had any issues with the keyboard and the dock. I keep the keyboard plugged in and dock and un-dock maybe 20 times a day. Never once had an issue.
Also, there is a light on the top of the right side of the sliding arm that shows when the power is working on the dock.
I've had a few annoying issues with my surface, particularly with the very early firmware ( it should NOT take 3 firmware upgrades before the visual works correctly when docked) But it's amazing. I use the pen constantly for sketching ideas and designs, it's powerful enough to use light maya / photoshop / shiva / etc.I can work during take off and landing and don't need to remove it from my bag in security.
I'm not a shill, it's just awesome for me.