I have a cheapie Behringer CT100 ($30) and it works great. I use a meter if I need to, but it is really nice to be able to plug a cable in and know without needing three or four hands to hold both cable ends, both meter leads and the meter. Also, the ct100 has an intermittent function where you can plug the cable in and wiggle the ends and it will tell you if something is flaky. If i think I have an intermittent cable I'll do this and I can flex the cable all up and down its length to find the trouble spot.
As this tester is a ripoff of someone else's design, I hate to recommend it. But since I got mine before I knew it was a ripoff, it's OK for me to use it ;-) The intermittent function is very useful.