My charger turned up promptly but doesn't look anything like the image shown next to the listing. My last charger (a genuine Blackberry charger allegedly) failed - the metal contact at the end lost it's spring inside the case and was beyond fixing, so I choose this one on the basis that the image shows a product which appears to be a little sturdier than the usual crop. What I received was a charger for a Motorola V8 which looks OK and does apear to work, but it's not what I ordered! My response from Prepaymania (who also aren't the people listed as the suppliers so I don't know how that works) was a fairly throw away kind of "It's compatible with your Blackberry so it's not a problem". OK, so the charger works but that's not the point. You wouldn't order a pair of Levis then be happy if another brand turned up, even if they fitted. The point is you expect to receive what you ordered and if it's not available they should at least contact you to explain what they're sending and offer you the chance to decline it.
The product will probably be no better or worse than any of the other available options, but only 3 stars in light of the less than satisfactory buyer experience.