I personally rely on Motu gear and have done so for many years now. I find their hardware to be reliable, built to last, full featured and most important, their drivers tend to be 'rock solid' and available throughout almost all of the OS X updates over the years.
Example: My original Motu Ultralite Mk1 is still functioning great and has worked basically flawlessly during all the various OS X versions from Tiger (10.4) right through to the most recent Yosemite 10.10.3 without issue. Motu seem to have the knack of getting their drivers right, from day one and often make them available well in advance of any forthcoming OS X updates.. which cannot be said of a large majority of other hardware manufacturers unfortunately.