Like I said - I've got two of them.
And I run a Light & Motion VIS180 on the rear of my commuter bike.
Agreed they're not cheap - but then again you generally get what you pay for in this life. Lots of stuff related to cycling can be expensive. Lights (both front & rear) are one thing that I don't mind spending serious money on. Particularly when they're relatively heavy duty, USB re-chargeable, and massively bright.
Nothing will help you if you happen to meet the one-in-a-million arsehole driver that just doesn't look, but having bright lights is a big help for the others.
Do you really need a fvcking law to tell you not to text & drive?