That's pretty much it, I can't ask for a long-term test with just a three week window. Some angles that could be covered and which normally cause issues with dynamo chargers;
1. compatibility with your devices
2. slow speed performance
3. build quality, your impressions on reliability, water resistance
4. installation, appearance, neatness
5. effectiveness at cruising speed (how fast a device charges within a given amount of time)
Regards
Andrew