We use variflow teats - they are good! We used the tommee tippee closer to nature with DD at first but from about 6 months used the Avent variflow to get her to take more milk (she is on reflux formula).
I do find the Avent teats an awful lot faster than the TT. They also work in a slightly different way, TT baby just sucks but the Avent have marks around the teat and you turn it to get different settings.
Glad you had a better feed - hope it continues for you!
Laura