Chances of pregnancy after vasectomy reversal?

I have been asking questions about vasectomy reversal and pregnancy..I have been getting alot of negatives saying pregnancy probably wont be achieved or the chances are very small and someone even said that the doctors that do those surgeries are scammers and know it doesnt work..So I am getting very frustrated at the fact that we possibly spent alot of money on a surgery that will not work..We were told that it is not guaranteed but was also given a 60-75% chance of pregnancy since it had been less than 2 years and we have a child together already..So please if anyone has a positive experience, can you please share it with me? thank you and only positive stories please!!!