v2 parts a must - trigger and gold bolt if you have the cash
full shift kit if you do not have a barrel kit
Efficiency, light weight, consistent, accurate, very quiet and very fast.
Valve o-ring wears out after 3-4 days of play
Having played with private label shockers and Dye/Proto's I can say with confidence that the Clone is one of the best (if not the best) spool valve marker on the market. Out of the box the Clone comes with all the features you expect in a high-end marker.
The stock board is fully adjustable and offers 10 firing modes. Better still, it is user upgradeable via usb cable. So, if/when MacDev releases new firmware you will be able to flash the board yourself.
On a full 68/4500 fill the clone will shoot over 1500 balls, making it one of the most efficient spoolies on the market. Also, I have found the clone to be very consistent (+/- 5fps) marker. I always leave the field shooting the same over the chrono that I started the day at.
With the Shift Kit, the Clone is very accurate even with cheap paint. I shoot $30/case paint and have no issues with accuracy. The Clone is also very gentle on paint. I shoot cases of paint in a days play and never have chopping or breaks.
As for speed, the Clone will cycle at 29.9 bps, and will shoot in the mid twenties with any high-end hopper. Speed isn't everything, but the clone does offer a great balance between speed and gentleness.
The Clone is also the quietest marker I have heard to date. This, of course, is a testament to just how efficient/gentle it is.
If you are in the market for a high-end marker I absolutely recommend the Clone. They are a great value, have great customer service, and will not fail you on the field.