Alright, here is my prospective on it:
Barrel is almost a must, but the one on there lets you shoot a paintball so at least you have one. I think that is the only upgrade for a newer player.
It definitely isn't the best gun, but it is by far the best one that operates on CO2 and you get the best bang for you buck. But it's made by Smart Parts
but, they are getting better.
If you compare it to a spyder VS1, then the VS1 needs a barrel and a feedneck and it kicks more. ROF is about the same on the VS1 and the Vibe, but with the Vibe it has Semi, 3 round burst and Full Auto. The VS1 has only semi and 3 round burst. The VS1 has eyes, but the Vibe's bolt operates on such a low pressure that even if a ball gets halfway in the breech, it won't break it. I think it's safe to say: Vibe>VS1 simply because of the feedneck and ROF options, OH! Also the Vibe has a regulator(that works good on CO2) and the VS1 has a gas thru grip. But, the VS1 comes with a charger and rechargeable 9 volt battery.