GolF Club

Great forearm strengthening (2008-08-18)
This provides a great forearm and wrist strenthening exercise perfect for tennis or overall strength, especially if you have tennis elbow and weak wrists.

It doesn't work (2008-05-25)
When I bought I thought I could avoid start power ball manually. Forget this, because it's week and simply doesn't work as purposed.

Great for arm strength and conditioning. (2008-05-23)
This item is perfect for me for two reasons:
1) I type very fast and use the computer very often.
2) I'm a tennis player.

I purchased this in September of '07 and have been using it ever since, almost everyday. I bought this with the intent of helping me achieve better arm strength and grip since I play tennis. I have not had tennis elbow or any pain or soreness in my hand,wrist,forearm,etc.

If you do not use proper technique with the string, the tip of the string can easily break off and then you'd have to use the dock or the advanced techniques. The dock is constructed very cheaply IMO. Looks like something someone made in the garage. It is effective though, and the only complaint I have about the dock is that I have to keep buying batteries (so I'd recommend rechargeable batteries, it uses two-AAA).

Don't read some of these reviews on here that say the dock takes forever to start up the ball. It only takes maybe 5-7 seconds to get the ball started up using the dock, which isn't that bad considering it already has a ton of momentum for you to work with.

Also, this isn't just a "toy" like some of the reviewers here have stated. If used properly with the right technique and repetition, you'll be using this thing everyday. I'd definitely recommend it for those who need physical therapy, those who play tennis a lot, and those who use the computer as often as I do.

All in all, I don't have any real complaints about it. I bought my Gyroball from Sharper Image and purchased an extended warranty on it. Don't know if Amazon offers one on their website though. The only reason I gave it 5* despite the criticisms about the dock and string are for the performance and usage of the gyroball itself.

Forget the Dock, just buy the Powerball (2008-02-26)
I like my blue Powerball but the Dock is worthless. It is much, much easier to get the ball started with the string. I probably should have gotten the Amber Powerball, since the blue one seems a bit limited. My hand strength is above average but not great. I use Gripmaster Med and Heavy Tension daily.

PowerBall is excellent, but skip the docking station (2007-12-23)
The PowerBall provides an excellent workout for the hands and forearms. The accompanying documentation (CD-ROM video) describes additional benefits such as it being a good workout for the biceps, but these claims are laughable overstatements. The PowerBall is well made and I expect it will last a long time. However, the Docking Station is not worth the cost; it is cheaply made and does not work very well. I recommend just getting the PowerBall by itself and using the string to get it started.