This depends on our style of play but I would recommend an upgraded barrel.
Mag/hopper fed and it is a fast conversion
None that I have noticed so far.
My marker arrived with in 3 days of the date it was shipped and was very well presented. When I brought it to the field the first comment I recived on the marker was "that is how all paintball guns should come" I first noticed how durable it was built compared to my experience with similar markers. It was very easy to assemble out of the case, all I had to do was screw in the barrel and put the tank and stock on. I emptied a few shots at 50' and the grouping was very tight but the paint started to curve at farther distances. The stock offers perfect performance if you are playing CQB. For woods ball I would recommend an up graded barrel. I put on a 14" smartparts "riffled" barrel and the grouping was very tight and farther distances. Through out the day I went through about 500 rounds of paint both breech and camotech. I had no ball breaks except for two that were in my mags. I should point out that the paint broke in my Rap 4 mags and not my milsig mags. I was able to get about 150 rounds per 3000/13" tank. My Elite performed flawlessly all day. It lived up to and surpassed all the hype behind it.
I would recommend this marker to anyone who wants the closest realistic experience they can get. To many times I have seen welt covered players use the excuse its not me its the marker. Put a milsig in there hands, if they cant own the field with this marker then its not the marker that needs improving.