This thing just plain works. As far as high end markers, timmies do not break down, which is key in a tournament as being on the field without a working gun is about as frustrating as not being on the field. The accuracy of this marker is great, especially if coupled with a barrel system which allows proper ball to barrel matching. The trajectory of the paint is second only to trixies and cockers. The marker is quite fast out of the box, but a was equalizer helps to speed it up. I highly recommend the equalizer, as it has a firing mode called forced, which completely eliminates ball chopping. With the sob, I still broke paint on occasion because the eye mode on the sob board only waits a quarter second after not seeing paint before it fires. If it happens to take more than a quarter second for the paint to load, you will chop. With the forced mode on the equalizer, the marker simply does not fire until a ball is loaded in the breach. The eye in a timmy is the best in my opinion because it relies on beam braking, rather than reflection to detect the ball, allowing all colors of paint shell to be used effectively. I would suggest getting a was eye for the timmy though, as it really does have the ability to see through a small amount of paint, meaning it will still work even if not cleaned thouroghly.
The clamshell frame is quite comfortable, as is the stock trigger. The timmy is very energy efficient in terms of battery drainage, I have found that on a typical battery I can shoot at least 20 cases of paint. I have a volumizer on my z, and as such I average 8+ tubes plus a hopper off my 68/45 tank. trigger adjustment is easy to do relying on three external set-screws. I reccomend using a little BLUE loctite on these set-screws so they do not shift position over time (note do NOT use RED locktite, as you will not be able to adjust the trigger after). I chose to install a shocktech ram kit in my Z, although next level also makes a nice ram and adjustable cleat. The importance of the adjustable cleat is debateable, but it does allow you to reduce the travel of the bolt and ram to increase ROF. I chose the shocktech ram because it uses a different ram bumper from the origional ram. The stock ram bumper will wear out after a good number of shots, and if this happens you might end up with a gun which isn't working, and requires supergluing a bumper onto the ram. The shocktech ram bumper doesn't wear out, period. It does however increase the kick on the marker a slight bit, but not too much. I chose to install the chekit bolt mostly because it has grooves on either side which reduce wear on the timmy ball detents, which tend to wear out quickly. No matter what bolt you use, I highly recommend always keeping extra detents.
Z timmys rock! with a few minor uprades this gun performs flawlessly every time you step onto the field. Couple that with accuracy, speed, and efficiency and what have you got? A super killer! I would rate the Z-timmy a ten with all the upgrades mentioned, but since it comes standard with the SOB it only gets a 9. Kudos to those of you who actually took the time to read this massive review.