These old open class gliders were designed for max LD at quite low speed, nothing else. Their handling in the air is not good and on the ground it is just awful. You will fly less because of this. I usually fly modern glider from std. class to 18/20m class. I flew one summer mostly Std. Cirrus and did enjoy xc flying exactly same as with any other type. You fly exactly same tactic as with modern glider, only with lower airspeed duirng glider and taking few more climbs. With a glider like Std. Libelle, thermalling is actually fun. Saying that thermalling is fun with N2 buys you a ticket to hospital with padded walls. There is a very good reason N2 is cheap to buy.