A couple of the unique things about the LB are the double screens for "over the shoulder" and "on the table" operation and integrated bluetooth for sending recordings back to base.
I will get my hands on one in a few weeks time for a proper review and will give it a full and honest review as I did with the Nagra VI. Anything I don't like I will discuss with the manufacturers (as I did with the VI and they changed with firmware updates).
After using the Nagra VI and they fixed my query I just had to buy one it was so good.
SD stuff I do like a lot, though I do have a few reservations on the 788T (heat and fiddly controls mainly).
Zaxcom I respect for being the first HD recorder and they make some good stuff. But I don't like their attitude - I won't go into chapter and verse, but I have met the man from Zaxcom and know several users. I'm not saying they are bad, just that there are certain things I don't like and reasons I would not buy one.
The Cantar is great, just it's fat too expensive for me - the Nagra VI pushed me to the limit.