I got some of the EZ Flow and Ultrasol in soft and I think they are pretty good.
Here is my take on them so far after one quick pour.
The +
They seem to heat up a bit faster.
They pour pretty nicely.
They don't smoke a hole lot.
They don't seem to really separate and settle.
The -
I have had a little bubbling with the Ultrsol but not to bad.
The Ez flow just seems like really extra soft plastic and takes a long time to set.
Because they heat up faster you have to be a little more careful with the heat.
I could be wrong about this one but I think the baits might have a little stronger plastic smell after setting.
Over all so far I like them.
By the way I use a hotplate not a micro.
Other Plastics I have used are M-F, Lurecraft & Ozarktackle.