I live in NY state and had roof ice dam damage in a past year. Ever since
then I've had additional under-eave ventilation vents put in and try to keep
parts of my roof clean (to some degree) of winter snow using a long handled
shovel. My roofer recommended a roof rake with a telescoping handle system.

Can anyone who has used one of these comment on how well it works, what
types/brands are recommended, width of the blade, etc.
They all seem to look similar and are constructed the same. The only
difference that I can see (on the internet) is that they are of varying
widths (blade).

Any assistance / recommendations are appreciated.

Thanks!
Walter