Had the unit a week now so here are my thoughts.
Firstly v1.04 has no feature/function upgrades just allows for an auto standby feature.
Straightforward to use if you have previous digital multitrack recording experience, if not it might take you half a day to get your head round it but compared to my akai dps 12 and Roland 1680 it is very straightforward.
Tascam have kept it simple but at the price of flexibility ie: with the roland you had very good control over a lot of effects but with the Tascam to get the best from the unit you have to make some mixing decisions at the recording stage which obviously cannot be changed later, however the effects are very good quality and although a little limited, with a little planning the overall result is excellent. You can also connect an external effects unit to give additional flexibility.
A larger screen would have been nice but the colour and clarity is fine as long as you are working close up, if you are across the room with a foot pedal you might struggle.
No digital in/out but I guess with the internal cdrw it's not that much of a loss.
You cannot save mixer scenes which is something Tascam should address in a software update, however all mixer settings (pan eq effects etc) except levels are saved each time as song data.
The sd storage seems fine and quiet!
At the end of the day this unit produces very high quality recordings and a lot of tracks to play with, the operation is simple for such a powerful piece of kit. To make it perfect I would have liked a few more internal effects, mixer scene saving, a larger screen or video output but overall I love it and thank Tascam for keeping the faith.
Any questions please ask, I will do my best.
