Nice to have for either an old player or better yet a new one if you find one that isn't overly priced.  I suggest using it every estimated 24 hours of playing those really old tapes or when you notice sound or video issues that weren't there before.  I got this but it arrived a couple days later than expected but that was not because of the seller.  Luckily it was no big deal.  And that carrier was USPS.  Not my favorite way of delivery but things happen.