We have them for our ambulances and they are awesome.
Socks are not a replacement for chains and chains are not a replacement for socks.
While they do a similar job, they both have advantages and disadvantages. Just make sure you are using the right one for the right job.
2016 Chevy 3500 DRW, crew cab (Soon to be 2014 Volvo 630).
2016 Fuzion 325T
675ah AGM, MSH 3012 inverter, 960w Solar.