Went to this from a Strix 1070 ti and intends to start from it.
Purchased from overclockersuk for 3900kr incl. shipping
Runs a subvolt of -150 mV and overclocked the memory to 980mhz (Hynix, Warning that this seems to be among the top 1% of Hynix HBM2, Samsung still performs a bit better per mhz), core at about 1570mhz, + 50% power limit ( never goes above 10%).
With stock settings, the core throttles due to the 180w power limit, by undervolting the core speed boost correctly to higher numbers.
About the same to 10% better performance than an overclocked 1070t (2050mhz core, 9000mhz mem).
Similar power consumption around 220w with similar temperatures and sound levels for both cards.
+ Reasonably good game-bundle even if the games are not released yet.
+ Driver UI, Nvidia's UI feels ancient in comparison.
+ Features in drivers such as overclocking, radeon chill, fan control etc.
+ No need to log in to Geforce Experience to get some features.
+ Zero case, the card is completely straight in my chassis.
- Need to manually undervolve to get good perf / watt.
- Nvidia's NVENC codec has much higher quality than AMD's own capture codec.
Star off because the card does not have good perf / watt without spending 30min by undermining the core and overclocking the memory, which however AMD has done quite easily with its drivers.
Overall satisfied with the change from a 1070 to Vega 56.
A few months later: Nvidia now has support for freesync and the 2060n has similar performance with lower power consumption with 2GB less VRAM.
AMD has released support for tighter memory timings (+ 7% performance for my card).
As an ordinary person: Look mainly at the selection of rtx 2060 cards when Vega 56 will lie behind without overclocking the memory and undervolving the core voltage.
If you like to "think" with your card then AMD still has much more freedom for this.