Yes Yes Yes they are worth EVERY CENT!! Now I know its rude to use capitals but they are brilliant things and I love mine soooooo much!!
For the past 3 years I used a Sunbeam Cafe Series which was great but it didnt mulch up fruit or veg to a smooth consistency so I was missing out on the benefit of throwing in kale or an apple for example as it would turn out chunky and just ruin the smoothie.
My parents gave me some money for Christmas to buy clothes but I ended up putting it toward the blender instead and I am sooo happy I did. I've had mine for about 4 weeks now. Because of the price and the fact I felt guilty spending so much on a blender, I literally spent months (about 9 months all up) researching the Vitamix, Blendtec, Omniblend, Kitchenaid etc etc and watched a heap of You Tube videos where there versed each brand.
The blades on the Vitamix spin at something like 385kms/hour so that together with the blade design and shape of the cannister (plus the tamper which you can use to push fruit or veg around if needed) just make it work so well.
I would honestly not even think about buying another brand as I think the Vitamix is tried and tested and will not only do the job to perfection but last years and years.
My Grandmother had a Vitamix (1950's model) and sadly I dont know what happened to it when she moved into her retirement village 5 years ago (it still worked perfectly though I suspect no one in the family wanted such an old looking machine). I always remember her making me milk shakes in it when I was growing up