The pacmate bx440 hasn't let me down.  40 cells of braille is ok.  I have a braillex here at work and an alva 380 at home.  That is probably why I don't use the pacmate as much as I thought I would.  Surprisingly enough the alva is about 13 years old and asside from a little cosmetic damage on the right side it works great.  I tried to sell this one a while back and was told that 1800 was to much to ask.  If that is the case, I'll just hold on to it.  I do use it regularly.