In the past, we have had difficulty finding tubular locks that are good for practice picking. Most tubular locks fall into one of two camps: very tough or totally awful. The former is not a good choice for practice picking, particularly for first-timers. Spooled driver pins, mushroomed key pins, and varying strength springs all make for a rather difficult experience. The latter, however, are equally frustrating... locks that are so badly-made as to fall immediately open upon the first application of a tubular pick might be a neat party trick, but they do little to actually teach someone about technique. These tubular locks are ones that TOOOL HQ found after a long process of research and they present a real but surmountable challenge. You should be able to get them open within 5 minutes or so, given an adequate pick tool. Just adjust your firmness and use a good technique and it should all work well for you!
Please note that this lock cylinder is a North American T-Handle cylinder format (usually found in vending machines), and is not compatible with the TOOOL KiKLock Padlock.