Inexpensive tele-coverter for Olympus XZ-1 - any good?

Paul Griffiths wrote:

You may want to look at the Olympus B-300 tele converter. This is the predecessor to the TCON-17 and enjoyed a near legendary reputation in its day (key words, "in its day"!) I have the a B-300 that I use on my Olympus C-730 (yep, old!) and I find it to be a solid performer. I honestly don't know, however, how it will perform on the newer and much higher mega-pixels digital cameras.

Here's one on E-bay -
http://www.ebay.com/itm/Olympus-IS-L-Camera-Lens-B-300-HQ-Converter-1-7X-for-IS-3-/251214257654?pt=Camera_Lenses&hash=item3a7d895df6

Regards,

Paul in NoVA