Oh, no, my good internet friend.... OCEANIC is crap. Out of all the commonly available synethtic sea salts (since not everyone is blessed enough to have LFSs that carry Tropic Marin or other high grade sea salts), Kent and Instant Ocean are two of the best you can find.
Oceanic mixes the best out of all the synthetic sea salts, making it nice for FOWLR.... but.... here's the rub for all you reef keepers..... every wonder WHY it mixes so fast, even in cool to cold water? Because it's loaded with Manganese (no, not Japanese comics, but all the cold medicines I've been taking is making me chuckle heartily over my mental image...), which makes the salt more soluble.
After reading the independent study from the Advanced Aquarist and my own personal experience with Kent, I've been quite pleased with it. Yeah, it doesn't mix as swiftly as other salts (although, in my experience, it is definitely more soluble than Reef Crystal), but all the corals I have ever kept with it have done very nicely, from softies to SPS and even clams and inverts. All the market research points to Kent being a pretty decent salt (although, as previously admitted, there is no perfect synthetic sea salt), fairly commonly available, and not too terribly high priced (although, certainly not as cheap as the lower grade salts like Oceanic).
If your familiar with different reef toxins and compounds, you should definitely check out the study, both the part I and part II. Very interesting stuff. Although, SeaChem salts were not a part of the study, and I don't think Red Sea was either, so the one from the Advanced Aquarist does not count those into their consideration. =/