The user interface across the entire Canon SD digital camera series remains the same in general lines. In case you find it difficult to make up your mind, you should ask yourself the following questions because not all SD-series are alike. What kind of shooting angle do you want? How many MP do you want? Do you want an optical view finder? And so on. If you go to a store, you'll basically check the size, the weight and the setting, but when you read online reviews, you actually see what features stand out.
For a good purchase, you should check both online and in stores, so that you have a chance to test the camera. According to critical opinions the entire SD series from Canon is not consistent in terms of design. There have been too many changes from one release to another that people start asking why this is happening. Another issue that you'll come across if you check forums is the video recording options. Some cameras have only Quicktime with MOV codec while others have AVI format.
Although for someone who is not familiar with these technical terms, it will be difficult to follow through, for a more experienced camera user, such differences matters. This means that you have two choices: to shop randomly and get a camera to take some pictures every now and then. That won't be too hard to find, and you don't have to trouble yourself with some advanced search. Yet, a hobbyist will always want to look into the details of any Canon SD digital camera before purchasing.
There are lots of places to shop for some Canon SD digital camera, but for many people the Internet remains the most popular and comfortable choice. Besides reviews and professional assistance from Canon, you also find answers from the other community members that can make the choice of the camera easier. For a hobbyist, reading on the next 'toy' to purchase sounds like fun. Enjoy it!