Its not really a sucker bet, normally the vig( 20 cents total) is the same as any individual game total, at almost any book.
It often gets cancelled, though.
Any rained out/ shortened game kills the bet. I lean to overs on more games than under today.
I haven't bet it in a long time. I prefer to bet the totals I like, and at Matchbook odds. MB doesn't offer it.