I have a Thor Tamper as well. I believe the spelling is Myrtlewood, although he does make quite a few variants. I picked mine up whilts in the states last year.
I think the hor tamper is as much a work of art as a usefull addition to my tamper collection.
Wny? Well firstly the all wood tamper doesnt take kindly to my tamping style. Maybe im the problems.
Obviously hitting the tamper on the portafilter to remove grinds from the outside of the basket is out, else you would soon have a very sad looking tamper indeed.
Secondly the "twist" of the tanper that I normally use to shine the pre-infused puck is not particularly functional either. I found that the coffee is abrasive on the soft bottom of the tamper, and the first few twists take off the polish. Later the abrasion of the bottom of the tamper increases and eventually the tist actually tears the puck up...
So the Thor tamper lives on the shelf above my fathers coffee machine at his place (i actually got the tamper for him). He appreciates things of beauty, much more so than i, and he isnt es exacting on his coffee standards so he uses to tamper on occasion.
Its a lovely thing tho :o)