Is it worth it to sign on?

It depends.

There are pros and cons to taking up a career as a civil servant:

Pros:

1. Job security

2. Consistent income

3. Subsidised facilities

Cons:

1. Strict top-down hierarchy

2. Emphasis on paper qualifications (may be hard for promotion)

3. Hard to transit to other careers

Monetary-wise, the officer scheme is definitely tempting with potential for large remuneration. https://blog.seedly.sg/sign-on-bonus-starting-salary-singapore-armed-forces-saf-army-navy-air-force-rsaf/

Personally, I prefer a civilian role therefore despite the attractive and stable pay, I'll not sign-on.