I've been following this pretty closely on the Guardian web site (it barely rates a mention in the Canadian press, except in business sections where it receives a lot of attention). My sympathies lie with the Remain crowd, I agree with whoever said they have largely botched making their case before the British public -- I blame Cameron and other Cons, though Corbyn has been pretty lukewarm.
Having said that, I have no idea what the long-term fallout would be from a brexit, it seems like it would be damaging to the EU itself which is already under considerable stress, due to rising nationalism and xenophobia among many constituent countries. And I think Britain would find itself cut off from a huge, important market at least for a while, which will likely be very, very damaging to its economy. I can see many head offices of large corporations (including our main client) there relocating tout suite. And then there's the Scotland thing.
Phone polling is generally more optimistic and seen as a more reliable indicator, but lots of pre-election polls were way off last GE so who knows. It's certainly a nail-biter, you're right there.
I voted Stay a couple of weeks ago. I have very little idea what most of the points made by either side were (it takes ages for the carrier pigeons to get over here), I just can't see how splitting up into smaller and smaller units can be helpful in any way. Also, I'm not sure I can complain about immigration when I'm living in another country.