It is well received now, but I also believe that NFL refs are fine with saying they were wrong on these challenges/replays because at that time, they might've not had the best view of the play and "WANT" to make the right call. MLB umps are a different story. I've seen some replays this year where it was definitely a no-brainer to overturn the call and they didn't. I don't care if it was really close and it basically comes down to judgement call. NFL still has those calls as well, but it seems like they get the no-brainers call 100% right now. Hopefully MLB will get to that point, but I have a hard time seeing some of these MLB umps overturning their own calls and losing some of the power/spotlight on the game they have right now.