I've owned many Logitech keyboards over the years & passed most of them on to friends/family etc still working great.
The Saitek Eclipse 2 that I've been using since they 1st come out is another matter

The illumination is decent & can be controlled, the lighting also shines through the lettering on the keys, not just between the gaps. Its nice to type on but NOWHERE near as tough (build quality) as even a £10 Logitech keyboard. Saitek will replacement broken keys etc FOC even out of warranty but I'd still say go for the G11. Especially with it being half price, its cheaper than my Eclipse.
Oh & I'll ordered a G11 now! lol