I love them . They leave other name brand boots in the dust! I always used SMB elites and CE legacy in the past but will never go back. They are well worth the money. They hold up well over time (i have 1 pair that I have used over 3 years and they still look like new), the velcro lasts forever and the support they give is unreal. I've noticed my gelding stops a lot harder with the rear boots as well. They really keep dirt and sand out! They do run smaller than smb's or legacy's so make sure you measure your horses legs before ordering. Their website shows how to measure correctly step by step. My gelding usually wears mediums in other brands but with Iconoclast he wears larges.
I have never had to use the rehab boots before but have heard rave reviews from people bringing a horse back to competition after some pretty serious suspensory and tendon injuries.