It's time I bit the bullet and get myself a collision avoidance system but wonder what experiences SD users have had.

We use the ever-improving PilotAware in the RV that allows us to see - and more importantly be warned audibly by SD - of traffic that might become a conflict. With the government subsidy have just added a Trig GPS to link to the transponder so that suitably equipped traffic sees us. It seems the best and cheapest solution with longevity.