Advantages are:-
Very, very cheap to run 2.5 gph.
Can fix it myself, ( got the BGA ticket ).
Easy to fly.
Fun to fly.
Capable of touring ( been to S France in one)
Will glide engine off, but not v well if T61F
Semi-aerobatic - loops and stuff.
Cheap spares, insurance etc.
The cheap ones like mine (T61F) are just fun machines, they don't pretend to be a Discus or a Firefly. Best money I've ever spent!