Does anyone have/has anyone tried the Shakeweight?

The product is a scam and does not do anything for you. There is also no such thing as "toning". The only thing you can do for yourself to provide the "toned" look you're most likely referring to is to weight train and decrease your body fat percentage.

I've had numerous arguments on the forums as to why this is true. I can elaborate more, but there's a good chance it'll just turn into an inane debate involving people that provide no back up and have no credibility. If you're willing to listen to reason though, I'll certainly take the time to explain. In the meantime, here are some sources to explain my point:
Shake weight scam:
http://www.healthandfitnessadvice.com/the-healthy-skeptic/the-shake-weight-gets-a-do-not-buy-recommendation.html
Important information regarding "toning":
http://www.bodybuilding.com/fun/goulet5.htm
http://www.musclehack.com/how-to-get-a-toned-body-weight-training-for-women/
http://figureathlete.t-nation.com/free_online_article/training/4_things_your_girlfriend_should_know
http://www.criticalbench.com/muscle_toning_workout.htm
http://www.criticalbench.com/progressive-overload.htm
http://www.musclehack.com/the-best-way-to-gain-muscle-mass/

I realize that's a lot to take in, but I think you'll believe it more if it's not just me giving you a summary. I can though, if that's what you want.

Hiya thanks, I had just deleted my comment before yours popped up. I looked up some reviews online and saw its total BS haha. Thanks!

an00bis, it depends on one's goals, of course.

You can't over look the principle of training specificity. As this article demonstrates: http://www.sportsci.org/news/traingain/resistance.html
When competitive swimmers, rowers, and cyclists strength trained there was no noticeable performance gain. The author suggests a focus on technique through sport specific exercises will yield the most benefit. So just as a cyclist will probably have the best luck improving their cycling by cycling, using the Shakeweight is the best training for the upcoming Shakeweight Olympiad. or any sort of sporting event that involves shaking a 2.5 lb weight vigorously.

Xskittlesx, I hope you will forgive me having a little fun.

haha, Oddity, you're absolutely right. I like that a lot.

If you want to be the best at doing sit ups, do only sit ups. Want to be the best at holding an oscillating 'weight'? Get the shakeweight immediately. If you want the 'toned' look in your ab region, use progressive overload to exercise your abs and decrease your body fat. Simple as that. Goes for every body part.

Skittles, I'm glad you did some research before buying it. Good work!