planning to buy XP photogear LVF-32 viewfinder

[deleuze3]

Hi,
i plan to buy LVF-32 viewfinder : https://www.youtube.com/watch?v=oxJlv9r_85c

Anyone tried it ?
how is it compared to the zacuto viewfinder or
the rokinon viewfinder ? http://www.bhphotovideo.com/c/produ...gview3x_vgear_universal_3x_magnification.html

thanks in advance