I've owned a DG-300 since the early nineties and have 2000+ hours in type. This includes a lot of Allegheny ridge flying and several 1000-km flights. Here are my comments, some of which echo others. Overall I'm glad to have chosen this ship and would replace it, if I had to, with another one.

+ Very "honest" airplane; no mean tricks
+ DG canopy/visibility, warm feet in cold wx yet not intolerable in summer
+ Comfortable seating position
+ 5-inch mainwheel with good brake energy
+ Pneumatic tailwheel
+ Performance very close to original Discus, maybe a tad worse at 75-80 KIAS and a tad better at higher speeds
+ Only minor L/D loss with rain, insect accretion
+ Good longitudinal stability; excellent ridge ship (esp. ith water)
+ Easy rigging (though wings are heavy)
+ May be priced lower than equivalent Discus
+ Experimental certification

- DG parts/support extortion
- DG parts/support extortion (worth at least a second mention...)
- DG parts/support extortion (... and a third)
- Underwing blowholes can clog (turbulator tape probably better)
- DG-300 ailerons are a bit heavy and it somewhat blacks the sexy, natural feel of other ships (Discus, LS-4, etc.) when thermaling. This said, its roll rate and climb are comparable.
- Cockpit ventilation may be inadequate for hot climates but mods are available
- While DG gelcoat is generally excellent, some ships have cracking, alligatoring, yellowing, etc. due to inconsistent QC at the Elan factory.