I have been using the rooting gel that comes in six pots - similar to
yoghurt pots but transparent.
Out of interest I trialled cuttings from an Anita variety fuchsia in both
the gel & in potting compost. Both were kept in a propagator for 2 weeks.
The gel cuttings produced good roots but the tops of the plants leaves
curled over dramatically & were a light green.
The traditional cuttings in potting compost looked a healthier darker green,
the leaves were normal and the root growth was as good as those in the gel.

Maybe the gel is more suitable for difficult cuttings or is it just a
gimmick.

SH