What are the benefits of the UOB stash account?

The stash account's benefit is basically the bonus interest and the bonus can go up to 0.95% which is pretty good (total of 1% interest if you put in $50,000). If you maintain a minimum of $10,000 in your stash account, you get a base of 0.05% interest and it will from there. Quite good if you are looking for an account that you are not planning to withdraw from just leaving money there to accumulate interest (the 1% interest is actually quite a big win)