Performance: 38 out of 40 for both
Both these kits just work. No matter if you have an lower end or high CPU they will indeed allow you to connect either a DisplayPort or HMDI monitor to a system that you otherwise could not. Of course, as they are limited to USB’s 10Gbps bandwidth do not expect to play your favorite games over them. They really are only for 2D scenarios.
Build Quality & Warranty: 36 out of 40 (DP), 29 out of 40 (HDMI)
The warranty of both of these units is pretty much industry standard at 1 year. That is to say good, but not spectacular. The build quality on the other hand is varies from decent to very good. Of the two the DisplayPort model is the better built option. The HDMI variant on the other hand makes use of a mediocre capacitor and relies way to heavily on plastic. As such the DP is a solid 36 out of 40, whereas the HDMI is 29 out of 40.
Value: 19 out of 20
This is where Phoenix really gets thing right. Yes the HDMI uses a mediocre capacitor, but both units are using good, top tier controllers to do the heavy lifting of converting USB into HMDI or DP signals.
Final Score: 93 out of 100 (DP), 86 out of 100 (HDMI)
While they are not perfect, for the asking price they darn near are. Good controllers, good enough aesthetics, with good enough (to very good) internal power circuity. You really will be hard pressed to find a better deal in their price range!