When I got to target weight (before I got married, thought I deserved a 'rest' from dieting and put it all back on, plus more) I did it by using weekly syns, our consultant recommended that and I'd never heard of only using them daily until I rejoined recently!!
The way I look at it is, if you're using flexi syns on a friday night and not compensating for it in the week, then you're having more syns than you would normally, and you can't get away with doing that on a regular basis and still lose weight. Whereas if you count weekly, you can still have your Friday night 'fun' but just reign it in a little the rest of the week and still lose weight.
I just can't get my head round flexi syns .... surely you can't do it on a regular basis or you just wont get the weightloss!?!?
J x