No doubt Soloflex is a quality exercise machine. It is more complex to setup and takes up more space then bands...at least the X3-Elite bands, which fit in the box they came in and easily slides under the bed. Setting up different exercises is effortless and quick. Soloflex offers a greater variety of movements than do bands. No matter whether you use, Soloflex, Nautilus, free weights or bands, none are miracle muscle builders....there is no such thing. Put the work in and you'll get results no matter what your choice of equipment is. Anything is better than nothing.
The one difference so far with bands is working until failure for good results. For me, it is really going to take some time to adapt, since this is not anything I've ever done before. The first step is for me to stop counting reps because when I do, I automatically set limits on how many reps I can do based on past experience. It means making a mind set change which is sometimes difficult for some of us to do.