I continue to use it , both as a studio unit and for remote stereo recording. I use the optical S/PDIF out, and have never had any trouble with it. The only problem after about 3 years is that the spring loaded lock on the XLR input on channel A died early on. Otherwise, it has worked like a champ. Admittedly, my primary use is stereo recording, so I don't generally need agressive compression, and EQ is used mostly in conjunction with the bass cut to control low frequency rumble. I have never used the coaxial S/PDIF out, so I can't tell you if there is any problem with it. At its price point, I would definitely buy the unit again. On remote, I use it for the front end of a Roland V-studio, bypassing the Roland's cruddy pres. In the studio, it is channels 3 and 4 after the Avalon. This usually means drum overheads and voiceovers (I do a lot of work on radio plays which involves a lot of open mics). If the Avalon gets tied up, as it often does, for lead vocals and a bass DI, the twinQ is my best choice for acoustic instruments and additional vocals. It has seen a lot of duty on violin and viola, as well as piano, Djembe, and whatever. I'd have to say it has served me very well, especially for stereo recording of ensembles, ranging from an 88 piece orchestra to chamber music, folk and roots, bluegrass and Reggae. It is usable as a DI, but I won't be writing home to mom about it. With an Avalon AD2022 in the rack, it doesn't see too much use in that capacity.
I have never experienced the hum I used to get from the digital out on the old twinQ with the add-on digital card. It has always been quiet as a sleeping cat, and you have to hit it hard to make it clip. Plenty of gain, even for an SM7 and an Oktava ribbon. If I have any complaint about it, it is that it has very little character/color. For what I use it for, i don't need or want that. A string quartet is not looking for a mic pre with character. No complaints here.-Richie