Reduces Variables in the sea of variables of making espresso.
Feels like a well machine hunk of metal in your hands.  
Dependable. Seems very accurate and consistent.

Costs a  lot on this part of the globe, or is hard to find.

I thought this might give me a an edge (or anyone using my machines) for have a consistent tamp.  I believe that these tampers do just that.  I will agree with most of the other reviews that speak about the way this Product feels in your hands that give you a sense of quality and stability.  I would like to relay to all about what I have found with the consistency ergo the reliability and quality of the product.   Anyone that has built aircraft or done major mechanical work with motorcycles or cars is probably familiar with a torque wrench.  This tamper give you the feel of reaching your desired pressure as with a torque wrench but does so without giving the operator an loud audible click.  I think you feel the click in your hand much more than you hear it.  Sense I bought this thinking of Torque wrenches, and have built aircraft, I know that Torque wrenches in aircraft plant always have to be checked for accuracy.  So I was interested in testing the tamper when I purchased it.  

I called around to see where I could find one here in Thailand and got the usual "Don't have it" and "cannot order it"  I call the states and could not get someone to ship it too me from... (you know who your are).  I finally found them at Highlander Coffee  in Singapore on the south side of the country/island/city just west of the "Marina" area.  I called and they they would ship to Thailand, but decided just to fly down there and look as they are expensive and I wanted to feel the click. (ok, and There was this friends party I went to, sounds good though)  I immediately felt the quality of the product in my hand but I could not decide which to purchase for my 58mm baskets... the Convex or the Flat.  Since I traveled so far, I bought them both and also a second flat one as a gift.  Turns out, this gave me a unique opportunity for testing.  When I was at Highlander Coffee I had only just clicked on a rubber tamping mat.  

Arriving home in Bangkok, I brought out the bathroom scale (disclaimer: this digital bathroom scale is not calibrated:-))  and low and behold I believe that these tampers click right at 30 lbs.  all three of them.  Of course you had more pounds if you want but it is easy to simply stop at the 30 lbs and now forever limiting one of the many variables in producing espresso.  During the these tests, I could not determine if one tamper was "heavier" or if it was calibrated to a different poundage.  On my scale, they were all the same to the nearest pound.  

I also took the Espro Tampers and pressed them together, with the intended tamping surfaces touching to see if I could tell which one "clicked" before the other.  To my amazement, I could not tell which one "clicked" first as they both with click at the same time.  This was repeatable among the three different pairs that I own...  Interesting.  

I have a few other fine metal tampers that I own. No "Fashion" tampers with recognizable brand names but great tampers none the less that feel good in my had and that is the way I selected them.  They are all now put away.  Back in a kitchen drawer under the silverware tray where I probably wont find them till I move again.  Just occurred to me that they could make a great paper weight as I try to describe what state they are currently in.    I feel like I have this power if you will.  Like I have been given a key to remove a variable from my daily espresso preparation.  I can now concentrate on the limitation of my current grinder, a Gaggia MDF ( I have a Ceado E37 on order)  or the variance in the fresh beans that I have been buying.  Yes, I have this power, and I see no reason to give it up.  That is to say I feel like now matter how much I think I could train myself to feel what 30 pounds feels like, I think it would vary much more than five pounds depending the level of rest that I have or how much I have been in the gym. (or how old I get! )
Cheers

Highlander Coffee Pte Ltd
49 Kampong Bahru Road
Singapore 169362  +65 6223 7102

I send out couple of emails asking about the product and they answered each immediately.  When I called, they were very helpful. But when I walked in, they treated like Royalty!   Phil, told me all about the Espro Tampers and his business.  Gave me a bag of some fresh roast and a free Latte.  I have been back to his shop since to purchase additional items.