Garden Party was my first Chanel eyeshadow palette (I have one other), and despite the fact that I do love it and have an almost creepy attachment to it, it is absolutely not worth the price. I don't remember exactly what it cost me, but I know it was well over $70AUD. Honestly, my $3.50US NYX singles are far better quality than this. The pigmentation of the pink and peachy colour is okay, but nothing fantastic, and the light green one is just craptacular. They're all quite hard and it's difficult to pick up a lot of product (which you need to do to get a decent amount of colour on your lid). The light green one is chalky and useless (I really have it in for that one).
I like to call this "Springtime in the 80s". Unfortunately, the photo doesn't show the lightness of these shades - in person the pink on my lid is much lighter and super shimmery. It's exactly what I would have worn circa 1986, though back then it would have been paired with some glaringly bright fuschia lipstick and electric blue mascara/eyeliner (and, shamefully, probably a red-tinted blush - or rouge, as it was generally called).
So what do I like about it? Every time I wear this - and I mean every single time - someone tells me I look pretty. I don't know what it is - maybe these colours particularly suit me, maybe the pink makes my green eyes stand out more, maybe everyone else is just lost in a swamp of 80s nostalgia like me. I don't know, but I'm a sucker for an unsolicited compliment, so I will continue to wear this every now and then. I wouldn't buy it again, though.