I have been trying out the new 149 II's for the past 3 weeks or so. Have been skating Indy's exclusively for the last 6 or so years, but wanted to show DLX some love since I've always loved their wood and in the last couple years (F4's), their wheels.
Coming from Indy, the Thunders feel really stable 2/3's of the way through the turn. In the last 1/3 of the turn, like someone else mentioned, they do get a little twitchy/sporty/what have you. I've been really pleasantly surprised with the Thunders. I had to loosen the kingpin about a whole turn on the back truck, and half turn on the front from the stock setting, and they feel really great.
Finally got some new pivot cups for my Indy's and decided to try out the Indy replacement bushings, so I'll be setting those up today to compare more and ultimately run with what feels better.