http://www.youtube.com/watch?v=FFBUv-QYU6M

http://www.youtube.com/watch?v=GcTeut1wE2o

http://www.youtube.com/watch?v=YZ2EX2aJ910

comments from manufacturer below:

in last 3 months I flew about 60 Hours with 304S jet.
Present time are a technical characteristics OK.
Volume Tanks in fuselage: 33Liters
This is petrol A1 + 4% Turbine oil
Consumption: depend on fly strategy.
Flying jet is the some like flying pure glider. Anyway, you can fly faster
as with propeller.
Glider polar is the some, only start is aprox. 1,5m higher - this mean
optimal climbing is on optimal gliding speed + aprox.10% reserve.
In good air is better flying more slowly (130-150Km/h) in bad air is better
flying faster (160-180Km/h).
Good characteristics are by speeds between 130km/h and 160Km/h.
Engine normal using is 85% for cruising speed 155Km/h.
Consumption is about 34 L/Hour.
Cruising ratio is about 150km with speed 150km/h.

You can use another strategy too- climbing and gliding without engine. For
climbing we use 95% of engine thrust (maximal thrust is you can use
5minutes)
Climbing by 130Km/h is about 1- 1,4m/s (depend of fly level - higher is
better).
Usually you can fly between 180-190km.

Until today testing our 304S jet about 100 pilots , usually from Germany.
They say, that noise in cockpit is half of noise in ASG-29 Turbo glider and
climbing is about 40% better + unlimited speed (by ASG-29 you must climbing
on 115Km/h).