Summary: Practically everyone agrees that this Tippmann (no, not Tippman) is one of the best markers you can get for the money. It is a great paintball gun for beginning and rec-ball players – very accurate, dependable, and durable -- and highly upgradable so that it can grow with you.
Shooting:The 98 Custom paintball gun has a fairly easy trigger pull, handles CO2 well, and rarely chops. However, the barrel starts loosing accuracy after 85-100 feet. An aftermarket barrel is a worthwhile investment. For distance, or as a good sniper barrel, the Tippmann Flatline may be your best option.
Maintenance:To clean, just remove the allen wrench screws. Reassembling is a little trickier (but easier than with the old Model 98) – consult the manual. The barrel is removable for easy cleaning on the field. With proper maintenance, the rugged 98 Custom should outlast most other paintball guns in its class.
Upgrades:The 98 Custom is designed to be very easy to upgrade, and there are a ton of accessories made to work with it. Other than the barrel, common upgrades include double triggers or a response trigger for rapid fire. Some people put a stock on it to make it a sniper rifle; others add a drop forward to make the gun more compact.