Which timing light should I buy?

SGBARRACUDA said
I was looking at the 5568 and the 3568 Innova on Amazon but they both have mixed reviews.

The 5568 has 151 5 star reviews 18 4 star reviews and only 15 3 star or less reviews on Amazon. I think thats pretty good.

Generally people are more inclined to give a review of something they have a complaint about.

Looks like if you have a problem you might as well buy a new one vs. repair but thats pretty much the case with a lot of electronics these days.