[Phanx]

"Good to use" is different for every player.

For example, I would not suggest any of the "show your combo points" addons because that feature is built into my unit frames, but if your unit frames don't show your combo points, or you don't like the way your unit frames show your combo points, then you probably want a combo point addon.

If you specifically ask for a combo points addon, people who use combo points addons will tell you which addon they use and why they think it's a good addon to use. They'll also tell you which addons they've tried in the past that you should avoid, and why.

If you're new to playing a rogue, or are coming back to the class after a long time not playing it, I'd actually suggest just playing without any class-specific addons for a while to get a feel for what kind of addons you're actually looking for.

If you find you have trouble keeping track of your debuffs on your target, look for a debuff timer addon -- in both the Rogue category and the Buffs/Debuff category. If you find you have trouble remembering to keep poisons on your weapons, look for an addon to remind you about it. You may even end up deciding you don't need any more addons!