Its features are limited, and print quality is only fair compared to most popular digital cameras in the market.
Even you like small size, the SD630 weights about 6 oz, there are quite a few other models out there that are just as small, and will perform better.
Look at your budget, I will suggest another small camera:
Casio Exilim EX-Z850
It has notably better picture quality than the SD630.
If you can go for a little bigger models, Canon’s Powershot A710IS will be a good choice, it weights about 9 oz.
Bigger yet, I will buy the Sony Cyber-shot DSC-H2.
In general bigger ones should perform better with the sacrifice of convenience. But technology has gotten better and better. Today’s tiny models are even better than bigger models just 2 years ago.
I will not suggest Advanced models which are even bigger and heavier, not to mention DSLR models.
About brand name, Canon does make good products, but the market is very competitive, so talking about specific models is better than just going by the brand.
Hope this will help.