I'll just write what I think about it since the features are well covered / known.
I use mostly on bass and vocals. On bass it is really great. It gives the bass
a thick and warm sound, while still retaining presence and "life". The compressor
also works well on bass. I usually record the bass DI.
On vocals it works well as long as you use the right mic. The LA610 doesn't IMO
work with all mics. It works better with bright mics than with dark, as some
combinations become too dark and lose their presence.
I really like the EQ although it is quite restricted and some say that it's useless.
It cuts really well out mud and adds air and clarity, by boosting the high band.
A good preamp to have. Not great on everything, but what is..