Believe me, I tried and/or worked with a lot of other sliders, being that free or premium plugins.
Soliloquy is the first one that fully works as expected, no matter if I use the free or the - awesome! - premium version of it.
The reason for that, are not only the features - which are already top notch - it's the coding quality that actually matters!
The developer has gone the extra mile and this really pays off. By far, this is the best coded slider in the WordPress world to date.
Also the support is highest quality, all my requests were answered within hours to highest satisfaction!
If you really need sliders for your clients etc. - go premium and buy the extensions. You WILL need them :-).
It's nice to have a fully featured free version for trying out - take it as nice bonus but don't forget to support the developer!