Outkast187 says:
I cant say enough about these gears. I have put more power to these things than most people will ever see, and no failures. They are stronger than the rest of the drive train, so the transmission is no longer a concern. I have broke 2 SM CVDs and bent one, and broke the 6mm output shaft as well. I have put around 10 races on the truck at this time, before I wouldn't get through a single race. The quality is 2nd to none on them as well.
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www.bomb-proofproducts.com

HiAmplidude says:
I have broken my personal top-speeds 3 times because of these gears.
My experiences with the gears come from comparison to both plastic and aluminum tranny cases with SM idler gears and high-end bearings. With those original gears, even with the SM idlers, I was not able to hit 51 MPH without the main gears grinding. After several times of this, I gave up trying until it was time to prototype test these things. Immediately, I was able to take my twin brushless truck up to top-speed without grinding, which just encouraged me to seek more. I slapped in a single, very powerful motor and ran it on a lot of cells to 5MPH faster than I had gone with even the twin setup. So, of course, I wanted more, and threw in an even more powerful motor, once again, passing that top-speed. So, of course, I wanted more, and threw in a motor that's even more powerful than that one, and blew into the 60MPH+ range, with a heavy extended aluminum truck.
The kind in extreme output it takes to move the big ol' heavy truck this fast through the wind and across the asphalt, with 4WD and full-size monster truck tires, is almost beyond comprehension... And, to do that in a truck that is also tuned to have the torque to yank the front end of this heavy/dropped truck into the air already accelerating into speeds exceeding 45 MPH.

None of this would even be remotely possible without the UltraMaxxed gears.
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www.rcnuts.com

Promod says:
Dan has a great product here!!! The gears are well made and SUPER strong!!!
My dual BL motor set-ups were destroying stock gears very easily now all my problems are gone. 
I have used some very powerful single and dual BL systems with no trans problems thanks to these wonderful gears.
The following BL systems were used when I tested the gears.
Dual C50's with 28 and 32 cells.
Dual Hacker L's with 28 and 32 cells.
Dual Lehner 1940's with 28 and 32 cells.
Single Hacker XL with 28 and 32 cells.
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Thank you,
Promod

More to come, but I think Outkast, HiAmp and Promod have said it all...
Here is a testimonial from one of the 3  unknown E-Maxxers that were able to obtain a pre-production final gear set, they were chosen to provide a well rounded group of end users based on power plants, cell counts, driving style and just overall differences to represent the E-Maxx transmission durability.
Shayne says:
Dan, has really made a extremely durable product, that has been able to with stand the punishment of pulling massive amounts of weight around. Here are the results before UltraMaxxed gears and after. All weight was from a dead stop, with the tranny locked in first gear....no pushing was done to help get it rolling...
Item being pulled : 400 Lbs (my old record)
100 Lbs cart
300 Lbs of sand
Stock tranny gears...Broke stock idlers after 10 ft of pulling
UltraMaxxed Gears.... 700 lbs (my new record)
100 lbs cart
600 lbs of sand
The UltraMaxxed gears not only took the abuse but kept on ticking.....I was able to pull this much weight running the following system...
Single 1920/8 Lehner BL motor
1895 micro BEC
12- 2400mah Ni-Cd matched cells in series
Gearing was 11t pinion /66t spur
If this gear set is able to withstand HiAmp's speed runs, Outkast insane driving habits, and Promod's multiple motor setups , and my weight pulling, then I think the gears have pretty much proven themselves. Great work Dan for seeing it thru till the end and Ben for your knowledge and years of work...going into the "mystery metal" which made these sets possible.
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rcmaniac  ((sjcrss))