OK, if Google has served me well, a Beretta 102 is a Beretta 76 relabeled under a system that Beretta used briefly after the Gun Control Act of 1968 went through. They went back to calling it a Beretta 76 after a couple of years.
I have had a Beretta 76 for over 15 years, and it is a good gun. Accuracy, reliability with a wide variety of ammunition, sights, balance - all of them are good, IMO. I am not a good enough shot to really wring out a target pistol, so I cannot tell if it is as good an S&W Model 41, or a high grade Ruger.
I like the Beretta because it is nicely muzzle heavy while still being fairly lightweight overall. The frame is aluminum alloy, not steel, which makes it rather light compared to other full-size target pistols.
I also like that it has an external hammer, and a 1911-style safety. This gives me confidence in handling it safely.
What is bad about it? It is hard and expensive to get spare magazines. There are reproductions, but I started out in gun collecting and target shooting a long time ago, when many reproduction magazines seemed to be of poor quality, so I have not tried them. Probably other parts are hard to get too, but I have never needed any. The black plastic grips are well shaped and sturdy, but get scuffed and scraped easily, damaging their appearance (but not their utility).
If you are going to shoot it intensively, the lack of spare mags and other parts are probably going to be a drawback. I have no idea if it is up to the job of competing in high-end target shooting matches nowadays, but my guess would be no. But if you want a good plinker with better accuracy than most, it would be a fine gun.
Couple of notes: The Beretta 76W was the same gun with grips made of walnut instead of plastic. I am pretty sure I have seen left-handed walnut grips for the 76/102, but I can't say the same about plastic grips.
The 76/102 was basically a version of the Beretta Model 70S .22 with a target barrel assembly, extended grips, a 10 round magazine, some alteration to the safety mechanism, and probably a few other changes that I forget. That means there is a very neat pocket-pistol size version of this same gun. I already had a 70S when I got the 76. I considered the 70S a fine shooter, and the 76 was even better. There is a member here with a very handsome hard-chromed 70S, and if we are lucky he will put up a picture of it again.