I must confess that when my order I had not realized that this G15 is an evolution of the first version in blue backlight and LCD swivel ...
1 part: design - This time lighting is orange and the screen became fixed, we like it or not but for my part I find it beautiful and practical in low light; added a drawing of the modern keyboard and many "racy" so I put 5 stars in design.
2nd part: Installation - If I have any problems when connecting and installation of key management software, they surprised me already because of two almost separate software that must be absolutely launched PC startup if one wants to enjoy all its features (a bit heavy in my goùt) Also this software lack friendliness and impractical and complete in terms of possibilities config ...
Last on installation, I had the unpleasant surprise to see appear a painful sizzling on my USB headset after installing the keyboard. Problem solved by uninstalling and reinstalling drivers Realtek sound card ... who knows why?!? 3 stars
3rd part: ease of use - from this point of view there no problem. Ergonomics and quality manufacturing made in Logitech is perfect (nothing less expected given the price) 5 stars
4th part: the "G" key - 6 buttons on the left side of the keyboard fully configurable according to your desires and needs, but combined with the keys "M" from January to March this offers 3 different possibilities of combination by touch. Added to this the ability to create macros directly by playing this represents a real ++ 5 stars
5 part: LCD - appraremment graphically improved since the first version of G15, it provides + some but too few games ... Logitech, for once, plays the card of idleness and leave it to d ingenious PCistes for the creation of such a great improvement plugins applet dedicated to Counter Source ...
For once I say "bouuuuuuuu" Logitech but I put 4 stars for rendering some applets developed and made available for free on the Web.
That's all I can say as of today. To conclude, I must tell you that only wealthy and resourceful Gamers will enjoy this keyboard that offers a lot but which under some criticism made above, does not deserve to spend almost 90.
Also for the more reasonable of you I would recommend the G11 much cheaper and equally useful despite the absence of that famous screen (luxury ...) which remains a little gadget highlighted by Logitech (bouuuuuu !!! )