Fluid sucks. They leak. Mag and wind suck too - not dependable.
The #1 best all around no doubt A+ numero uno trainer best engineered most reliable problem free...........
The 1-Up. They sell at a discount on eBay. Shipping is lightning fast, too.
I am my sis bought ours 3 years ago. Best investment I made in my training. Period.
'nuff said. Buy a 1-UP.