I went to a local marina, and I asked about maintenance on the trailer. They
suggested to me that my trailer needs a product called "Bearing buddy"
which can easily pump grease into the hub with a grease gun. I haven't
installed it yet coz wanna get some comments from you guys.

Any comments on this "Bearing Buddy" product? Is it worthy to install? is
it easy to do it myself or should I let the Marina guy to do it for me?
Thanks for any advice..

N.S.