There is no such thing as long copy only boring copy.
Ever seen the 800 page books that some Harry Potter
fans read? Why? Because it interest them. If you
make your writing interesting and the prospect is
interested in the product they cannot have too much
information about this product.
Normally higher prices items (requiring bigger commitment)
will require longer copy. Smaller price items will take
shorter copy as a rule of thumb.
Just think about it. You'll want to know more about
a house you're about to purchase than a bicycle.
99% of marketing tests show that long copy will
ouptull short copy everytime. This is especially
true when you give as many bulleted points as
possible.
Even a reader doesn't read all the letter the long
leeter gives the impression that this product has
a lot of benefit. That's why you should list every
benefit possible, even the obvious ones.
King Regards,
Ray Edwards
"the gets results copywriter!"
http://www.webcopy-writing.com