Smart slider 2 is an excellent slider. The free version is packed with tons of options and it seems to me, that the full version only add functionality and effects to those options.
I implemented the slider using the shortcode in a post and it works just right. I have created three unique sliders and have their ID's in the shortcode for mobile, tablet and normal. It works beaufifully.
The learning curve is somewhat steep, but with excellent support it's really not a thing to complain about.
I would use this plugin again in other projects.