We have been using LS at the
University of Otago
in New Zealand mainly for student alcohol use surveys. Our last survey had about 70 questions in 24 groups, lots of logic, and handled about 3500 responses without problems. At least one other unit is also using LS here but I cannot remember what for.
Before LS we had our own custom built web based surveys, usually involving copying and heavily modifying previous surveys. This was time consuming, error prone, and inflexible.
I chose LS for the following reasons:
- it's open source so I can fix problems or add features myself if I need to
- it runs on our LAMP stack no problem
- it's free...forever

- LS has more developers and testers than any other product I know
- LS has great community support
- users can modify their survey themselves
- there is no reason why I cannot export a survey and give it to someone else to run
- LS has more question types/features than any other product I know
The only reason I can think of for not using LS is if you don't actually want to run surveys, i.e. prefer if someone else hosts the product & surveys, but even then
LimeService
has the features and service at great prices.