1. alignment issues for many people, if the pipe to manifold alignment is off, which many is you will blow orings and couplers. Once you get this straightened out then the pipe does become more reliable...... None of this type of work has to be done to a B Pipe... No slotting of mounting tabs, making sure the coupler is not cut crooked or too long. definately no cutting of the hull to make the pipe fit.
2. No special mounts have to be used to mount the B Pipe, just bolt it on and go, with the Dry, you have to use a bracket that can have the threads get stripped out, lord mounts that can break, bolts that rust (many lord mounts do not use stainless studs and bolts).
3. Modifying a hood so the dry pipe will fit under it. This is an issue for sum.
4. With a dry pipe, depending on your compression and timing you may have to run higher octane than you would on a wet pipe. Conceding, the dry can make more power at different RPM's than a wet pipe.
Of all the dry's I prefer the Speedwerx...... If I were to build a lake ski that was just for ripping it up, not freestyle oriented it would have a speedwerx pipe.