I'm using these mallets in classical and contemporary wind-band music, on Adams fiberglass timpani.
These were bought to replace a pair of Adams TM 0 (staccato, maple) whose felt beaters had worn through.
The TT 0 has the same beater, but the shaft is tonkin (bamboo) instead of maple and is consequently quite a lot thinner. This does require some adjustment but the lighter, thinner shafts are more agile in the hand.
Producing a smooth roll requires less power for louder dynamics, while the shafts are still wide enough to control softer playing.
The heads are hard, smooth felt (not cotton wool) and produce an extremely well-defined attack. These are the hardest sticks in my bag, with the exception of baroque wooden heads.
Summary: a very good product. Would consider Adams in the future for sticks.