Review of the Glock 42...

... from Pistol-Training.com. The review is detailed, so if you are interested, I would suggest you read the whole thing. (The author also has photos comparing the size to a J-frame revolver). But in conclusion:

To sum things up, the ultimate question is if I had to spend my cash on it would I buy it. My answer is yes. I am an admitted Glock 9mm proselytizer and I was a little disappointed that this was not a 9mm. However, after actually seeing and more importantly shooting the 42, this is the one pistol that makes me consider a .380 for a back up pistol. The accuracy and operation of the pistol will make you think this pistol is much bigger than it actually is. Word on the street is these should go for around $399 on the civilian market and better for the blue label program. Make no mistake, this is a .380 that you can shoot and enjoy. I’d say Glock hit their objective of making a “shooter’s .380″. Instead of why should you buy it, I’d ask how couldn’t you?