Front headlight is wonderfully bright, even at medium setting - you get what you pay for in this regard. micro-USB charging is very convenient, given many phone charges use the same connection. Charge indicators are very handy given that the lights can run down rather quickly at full power. The light mounts onto the front handlebars very easily without extra components, though I wonder how perishable the strap will be over time.
Rear light has only two modes, continuous or gently pulsing, and I'm not sure the latter is very obvious. Also, it seems only designed to attach to the seat-post, and isn't easy to attach to the back of my pannier rack.
These comprise a fantastic light set with a combined weight of 175g (I measured this)! Both lights are easy to fit and operate and both can be recharged via a micro usb. In terms of power the Urban 550 is really good but ,to be honest, I don't tend to use it on its strongest setting. The next one down or third constant beam settings are fine for general road use. In terms of battery life I'm not sure that this lights lasts quite as long as is indicated on the product description; typically I am finding that on 1:20 minutes a day of use for 3 days on the 3rd constant setting I am needing to recharge but have not risked my regular daytime 2 hour loop to see if the second setting would last the whole time. The Vis Micro rear is great too although, again, I find that for road cycling one doesn't need the strongest setting when the second one down is just fine, and will, of course, last longer! In sum, great value lightweight light set so can definitely recommend. Delivery and price from Merlin Cycles was what you would expect too: excellent!