I've been with Pulse8 and IDNet and both have been fine.
I've had single thread speed problems with both. The Pulse8 issues was resolved after Adam badgered TTB to death. The IDNet issues is still in play, so we will have to wait and see on that one.
Both ISPs have impressed me in that they have been willing to work with me to try and get the single thread speed issues resolved.
Out of the two, it's hard to split them. Pulse8 is a smaller company and relies on Adam & Sam to provide the Broadband support. IDNet is bigger and provides nominal 24x7 cover.
In terms of value for money, it's hard to go against Pulse8. However it will cost you to move back onto a BTw phone line downstream. I made the choice to jump back to a BTw phone line and am relatively happy with IDNet.
I'm not willing to pay AAISP money and if I were to migrate now, it would almost certainly be to Uno.