Actually, it was $253 delivered ... the powertrax was more expensive anywhere I looked ($311 at Summit, $470 for the no-slip traction system, before tax/shipping). Very similar to the powertrax unit (lock-right unit), and for a very good reason - (see link)
Took a bit to get in stock due to production not meeting demand/orders.
Opened the box and it appears to be well made, and the instuctions are a small booklet that is well thought out and easy to read/understand.
Have read alot about it before I made the purchase, and not one bad comment, but plenty of accolades.
Should be interesting !!