These lights are bright, adjustable, perform for a long time, charge relatively fast. They also get you noticed by motorists and make training rides safer. I have used them in the rain and in fog. Excellent products that are well worth the cost.
I've used Nightrider lights for years and these are an excellent upgrade over my previous set which were the 800100.
The 250 in the back has made me A LOT more confident my light is visible. The previous 100 may have lost a little juice over the last 4-5 years.
The one downside with the lights is that the battery on the 250 doesn't last as long and I usually need to charge it after just about 1.5 hours of use - I'll take that minor inconvenience with being seen though. No issues with the 1200 battery life.