So so so good. The bang for the buck of this chip is off the scale! For the price you get an 8 core, 16 thread chip that runs at a 3.7GHz clock speed as standard. But the main feature of the "X" variants is the built-in XFR 2.0 algorithms. Unlike 1st gen Ryzen, XFR 2.0 looks to dynamically boost your clock speeds as much as possible, assuming only that thermal headroom is good. If you have a good air cooler, or water-cooling then you can expect clock speeds to boost to 4.2GHz very easily, and with a bit of silicon lottery luck, 4.3GHz is possible without any manual overclocking. Even better is the running temps, thanks to a soldered IHS the chip runs cool even when boosting. Using a Scythe Mugen 5, my idle temps average 30-35 degrees Celsius with load temps of 50-55 degrees Celsius.
Also included in the price is the Wraith Prism stock cooler. Unlike Intel's stock cooler, this one actually works. It's a very capable bit of kit, perfectly suited for the chip it's bundled with. An aftermarket cooler will probably provide more heat dissipation and less acoustic noise, but if you're on a budget this is perfectly adequate. It even has RGB if you're into that. But best yet, if you don't want it at all you can always sell it for a good 20 to 30 on ebay or wherever: people actually like this as a stock cooler instead of that garbage, destined-for-landfill design Intel makes.
All in, this is an extremely capable chip; and with 3rd Gen Ryzen on the way very soon; expect prices for this to drop. If you're on a budget, I'd wait for the price drop for this, but if not, 3rd Gen Ryzen is set to be even better. This is a multi-tasking and workstation monster and gets great gaming performance too.