Well, I'm glad you were able to install the brakes, But if your car is having some problems, I don't know if I would give myself an A+. Anyways, Check yyour master cylinder/brake booster again, because the hissing noise should be coming from there, could be the hoses too. torque everything to spec. Also, bleed the system again, if it is smooshy, something is not right.
When I installed my, mine felt strong.