Great

Great, easy to use, easy to set up, nicely designed with some thought behind it. Easy to configure and easy to style.

If you use the Shortcodes in Menu plugin, you can pop the language dropdown straight into your menus.

Most importantly is the quality of the support. I have worked with dozens of commercial plugin companies and have very rarely seen a good level of quality support. These guys could not be more helpful. I had not considered opting for the more functional paid plans for this plugin, but the support was so good that we will be budgeting for one of the pro versions in coming months.

I hope there is a lesson there for other paid plugin developers. Whereas people will resent spending money on a product with lousy customer service, customers will happily consider paying for a product they never planned to pay for, if the customer service is good.