I've had my share of Opus, even some of the fancier ones. Some were okay, some I MU'd (although he doesn't always MU opus,) some were fantastic and one was just exceptional. Fuente is not my style regularly but I have a box or two that I grab from when I feel like it. (But I bought at MSRP and don't think most are worth paying above MSRP.) Now, if you're talking Casa Fuente, that's a totally different story because I love that cigar.
I've been told that 4-5 years of age is when you should start smoking them. I personally don't find the consistency in them that I have found in MF stuff or old Liga.