Syrian army has nothing to gain and everything to loose by using chemical weapons. There is no logic that Syrian government would sign
their own death sentence by using chemicals and there is every logic in bandit efforts to use chemical weapons and assign the use to the
government forces so they would get bombed which would ultimately mean bandit victory.
It doesn't actually matter at all whether they use them or not... what matters is whether the west claims they have used them or not... don't confuse the truth with the "truth".
SAA & Hezbollah have seized Al Qusair. Not a big victory really. First - it took more than two weeks of heavy fighting to take the city, with heavy casualties (Hezbollah alone lost ~100 fighters), secondly - the remaining rebel forces managed to retreat after they ran out of ammo.
The claim they ran out of ammo sounds a little thin... couldn't they have had more ammo brought in via their escape route if that was all that was stopping them from defeating the attack?