Summary: Not bad, but not great either. It's just okay for me. I'm a gamer, not hardcore, but I game! I spend a good amount of time typing and gaming. The feel of the keys is a bit clunky in that they don't have the nice spring that you would find a mechanical keyboard with cherry mx blue switches to have. The M1, M2, and M3 buttons don't work for me, even after I set them in the gaming software dashboard - the colors stay stuck on whatever M3 was set to.
Summary: I recently bought the Logitech G930 Wireless Headset a few months ago, and it turned out to be a great purchase for me. Unfortunately, Logitech changed the LGS software and locked out the ability to adjust the Pre-Amp slider on the headset. The reason given was to comply with some European country's law or something... but I'm in the USA... so it doesn't make sense to do that for U.S. customers.
Pros: This is my third G-series keyboard, with the first two being the G15 and the G510. The backlighting is a little bit better on this model than on my previous keyboard and there is an on/off button to turn off all lights and LCD. The keyboard is a little bit higher up than my previous models so I'll have to get used to that. The bottom (belong spacebar) doesn't have the cheap paint that rubs off (I think) so this particular model might be able to keep it's finish a lot ...
Cons: Now comes the bad news. There are a couple of issues with the software. The problem lies with the LGS (gaming software) that controls everything. It's designed to be a unifying program for Logitech G-series gaming peripherals, which is great... but everything is dependent on a single program (Keyboard, Headset, Mouse) means they are all linked to the same program. Allow me to explain further.
Summary: There are no significant differences between the G15, G510 and the G19. If you are looking to upgrade and do not care about having adjustable backlighting and a colored LCD screen then go for the G510. If you want more programmable buttons go for the G510. If you don't want to pay top dollar for the same freaking keyboard Logitech released years ago with very minor upgrades, keep your old one. If you don't have a G15, get that one instead.
Summary: I recommended this rating because of the screen on the keyboard. Sometimes it will turn gray until you unplug it and plug it back in. You can tell its on, but it wont display anything. It is still a good keyboard seeing how this occurrence is rare, and also that it could just be my computer.
Summary: I purchased this keyboard a week ago in hopes that it would answer my gaming needs. It is definitely a lovely keyboard and it has a lot of neat features, but I had some problems with it. It doesn't take much time at all to setup or get initialized. It does require an external power source via a wall outlet to run the display. The display looks great and I tested most of the built in apps and they functioned properly.
IMO not worth the $$ to get a G19s, over the G510/G510s
Momma Mary "Expert Mom!", Amazon
13 June 2013
Summary: I got this as a replacement for my old G510. I loved my old G510 and I figured that the full color LCD would be a nice improvement even with the decreased number of G-keys. When I unboxed it the whole thing felt very cheap for a $200 keyboard. The glossy blue border around the keys is also plastic, along with the entire LCD enclosure. Also there are tiny grains of debris in-between the LCD and the cover, about the size of a pixel.