I have a Curt Q20 slider, and have never really needed the slider, even in my current truck (6.5' F-250). That being said, the upgrade to a slider wasn't really that much more in terms of cost, so if you can, get it. PEACE OF MIND!! But remember, the slider is heavier too. Man is it heavy. But I've had it for almost 6 years and it's been trouble free.
Ed and Sharon
2010 Wildcat 28RKBS
2011 Ford F-250 XLT, 6.7L PSD
Ride-Rite Airbags and Airlift wireless remote compressor...nice!
I thought I was wrong once, but I was wrong!