I've used a much older version of the one pictured recently, and it was good. Not exceptional like some nautilus stuff. There weren't a whole lot of available adjustments on it to really fine tune the rowing angle
Name a better way to strengthen your grip than by hanging onto some smooth black balls.
In all seriousness they work great and are a nice cheap pullup variation for additional grip work
Also expensive for a curl setup, but this is a great space saving way to add a curl machine to your gym. This will be a great way for me to get rid of my preacher curl bench and ass floor space for something bigger