Excellent value, feature rich, responsive support
I am hosting a large technical book on fliphtml5, and this really turned out to be the best platform for that. Aside from offering excellent value for money, the product is very flexible and feature rich, and allows tailoring the user experience to a great degree. Be prepared for a learning curve, but in a good way--you can get your project up and running in minutes and then learn and test all the options down the road. You can turn on or off various toolbar buttons including printing, download, zoom, navigation features, etc. The look of the interface as well as the book can be tweaked using textures, shade controls, cover styles, UI themes, custom backgrounds, and more. Page flip effects are attractive and perform well. You can edit all product labels and messages in any of the myriad supported languages, and probably add languages as well! What may be most important is that technical support is exceptional and easy to access straight from the product dashboard. Support agents are very responsive, quick to address issues, and open to receiving suggestions for product enhancements and modifications of current behaviors. The product falls short in two areas: 1) the login is based strictly on email/password combination and can't be tied to a device or restricted in how many simultaneous sessions are allowed, and 2) annotations are persisted only locally, and are wiped out when clearing browser cookies. This latter limitation is pretty bad if you have users who will need to access their comments, notes, and drawings on multiple devices. Also, their annotations will be subject to the impermanence of the browser cache. In that respect, it may be better giving users a PDF file, which, incidentally, you can make available as a download from the flipbook itself. You can allow downloading any file you choose, not only a file that fliphtml5 offers. In conclusion, FlipHTML5 is an extremely rich and versatile platform for publishing all kinds of documents. It offers a decent paywall, good performance, great flexibility, and excellent support at an affordable price. I don't think you'll find a better alternative.