I have SON dynamo and front and rear lights on several of my bikes. The USB port for feature for recharging my phone is a toss up. You need to be maintaining 10+ mph to reliably charge a cell phone.

The rest of the features range from great to awesome:

1. Charging a power brick - great. You do not need to maintain 10+mph to keep putting juice into the brick
2. Instant lights for front and back - awesome. This feature wins me over completely. No need to remember charging lights or replacing batteries. The lights turn on automatically at dusk or in a tunnel. Love it! Especially on multiday tours.