Well, have to define the word good. For me I think is good is because of the risk free, so you do not need to worry that your money will gone after a certain period of time.
So how it work is that, you will have to deposit a sum of money in OCBC and that amount of money, you wont be able to get until it mature. Let's say the current ongoing promotion which is deposit for a year to get 1.3% interest p.a, So in order to get that interest, you will need to put let say $5000 in the FD and you will not be able to get it until one year later.
If you have spare money for FD, then go ahead