MAC prep+prime. Is it worth it?

This is something that I have always been stuck in two minds about weather I should buy it or not. On one hand people rave about it a lot and I have always wanted something that would actually help keep my make up on. On the other hand its quite expensive and I hate when I spend a lot of money on things that don't work (don't we all). After much debating I decided I just have to give it a try if it don't work then at least I know and I will get over it but if it does then that would be amazing! Now to answer the question... is it worth it? YES 1000% YES!! I absolutely love it! Not only do I use it to prep+prime my face but I use it to wet my beauty blender, wet my eye shadow brush for when I want it to pick up more product and to help with products that are hard to get out of the pan, and by the way it works great for all these things. When I use this product my makeup looks so much more flawless and less cakey plus it helps my makeup stop clinging to my horrible dry skin and even after a long, hard, busy day I come back with my make up looking just as flawless as when I walked out the door when all I had to do is touch up a bit of lipstick threw the day. I would honestly advises getting this and I defiantly think it is worth it. I love coming back from a long day with my eyeliner still being fleeky and my highlight glowing like the sun (I like a lot of glow!) It doesn't have a nasty smell to it like some other products I have tried and it doesn't irritate my sensitive skin or leave me with a break out. The only downs side (sort of down side) is that it is that good at its jobs its hard to remove when it comes to take of your makeup at the end of the day, but I can deal with that.

Have you tried this product out how did it work for you?