The free version of LastPass covers the basic needs. You can store an unlimited number of items and share passwords. Using the browser extension (available for most major browsers) will allow you to generate strong new passwords when you're signing up for a new website, store account details, a...
LastPass is relatively straightforward. It comes with extensions for all major browsers that will take care of: generating strong new passwords when you're signing up for a new website, storing account details automatically, as well as filling in username and password fields automatically, etc.
The interface for managing your saved passwords is somewhat noisy and unintuitive. For example, clicking on an entry will not open it, it will only select it. You'll need to find the proper icon for each action. Many actions take more clicks than necessary.
Even if you have incorrectly put in wrong details on the log-in page, LastPass asks you to save. It would have been better if it only asks you after you have successfully logged in using the correct details.