I buy McCallum because I get paid to play... but they're also REAL nice.
They are ok. Naill, Atherton, Sinclair are all better attention to detail and more R&D into stability of the drones. McCallums are improving and their customer service is tops, but they are not going to be among the top brands . . . but they are reasonably priced and there are worse brands out there, to say the least. They are by far the best marketed pipes out there; McCallum is an advertising machine.

Andrew