[RTTY] Optical mouse?

[w7ti@dslextreme.com (Bill Turner)]

Anyone using an optical mouse?  

I'm getting tired of cleaning my standard one and wondering if an
optical would be better.  Do they really work as claimed?  Do they need
a special pad?

There seem to be two versions made:  400dpi and 800dpi.  Is the more
precise one any better for us contesters?  I suppose for some
applications such as CAD it would be.

I'm interested in the one at:

http://www.compusa.com/products/product_info.asp?product_code=275758

All comments appreciated.

73, Bill W7TI