"Not recommended for inexperienced pilots (from Gliding Safety - by
Derek Piggott)
The Libelle
The beauty of the Libelle is the light weight of the wings and the ease of

rigging and derigging. However, it is not for you unless you have
already made a few field landings and are an above-average pilot.
Although it is nice and easy to fly, the airbrakes are ineffective
compared with those on most other machines-an extra 5 knots on the
approach and you will be in the far hedge or the next field! Because of
these airbrakes, you must be able to side-slip quickly and accurately
while using full airbrake on the final approach. With less experienced
pilots, it is inevitable that the occasional approach will end up a little

high or fast, and only a quick side-slip can prevent an overshoot and an
expensive accident.

The Libelle suffers a serious loss of performance and buffets badly
unless it is flown accurately. This is probably due to the sharply pointed

top of the fuselage which causes a breakaway of the airflow if the glider
is flown with the slightest slip or skid. Having a short, stubby fin and
rudder, the Libelle is also not as directionally stable as later machines,

and this makes it more difficult to fly accurately than most other types.

In the air it is docile and pleasant to fly, but the poor airbrakes make
it
unsuitable for an inexperienced pilot. Larger pilots may find the cockpit
avery snug fit, as the top is rather narrow."