I was a bit worried that a "budget" low end TCAS could in the GA VFR community cause complacency and lead the user not to look out as much.
I sail a boat with a radar system that has a closing alarm. When I first got the system I used to set the alarm to 0.5NM and closing and drift along letting it do it's job. Well after it had been running for a couple of weeks and worked well I relied on it..............untill a very close shave with the Isle of White hover craft!
Perhaps I am giving a glum opinion of a device that may improve safety and would be interested to see what other people think.