My initial impressions of the R2 so far are favorable. I've had it running for a couple days now and it's solved some problems for me that no other router has. We live in the country (stateside) so have very limited bandwidth (wireless 10Mb/s down, 2Mb/s up). I installed the router and set a few settings to match my old router and all my devices connected with no issues. I'm not using any of the advanced gaming features yet, and just set the QOS silders for 70% to start.
We are able to have gaming sessions, streaming TV and downloads/updates going at the same time no problem. It's also worked well for the distance learning and working that we're doing now.
The only feature I miss that others have mentioned (and something I think all devices with lights should have) is the ability to turn off the LED's or limit it to just one for power.
I do have one problem with the R-Apps timing out that I'll detail in another post, but it's not affecting any connected devices...