Unions are pretty soft in general, the force sl is probably their stiffest binding. Their toe straps don't fit all boots well and their ratchets are hit and miss. A lot of people swear by them and there's probably the same number of people that don't like them. Personally I wouldn't buy them unless I could make sure my boots and their toe strap are compatible.
Thanks for all comments till now.
I finally got the hang of this, I think…
And I know, the Raiden Zeros are going to be too soft for my purposes… BUT
- I could get them for around 60 Euros (NEW, Season 2012)
- I am still learning (beginner/advanced, somewhere between), who wouldn't probably recognize the difference that much as a "Pro" would…?
So, these two reason seem to be pretty reasonable (for me) and acceptable.