Personally I'm biased, Love my ARC intake and I prefer it to the likes of GM intake/Short rams, but what other intakes have over the ARC is the fact they're not constucted of welded Aluminum...Which as 99% of ARC owners will know, is that the welds will inevitably fail.
This is due vibrations on the mounting points, effectively shaking the box to bits.
The sound may be awesome, but it doesn't sounds so good when it's sat on the shelf in the garage waiting to be fixed.. haha.
Once I get it re-welded I'll be reinstalling it with some special dampening bolts to try and prevent it from happening again...but we shall see.
Dispite this, I'd buy one again in a heartbeat, Echoing what @Chrismartin said, These are known to be better with low-midrange power (albeit 'marginally') but just where our cars need it the most.
As for the filter maintenance, Seeing the price of new replacement ones, I'm just bloody happy they're washable filters...