I've used it for Märzens. Produces good flavor in malty lagers. It leaves a little extra sweetness that helps with their flavor profile, but nothing cloying.
As they say in the description (below), she can be a bit slow in her first generation. My notes say, it took over a week to get the first round starter from a single Perfect-Pitch pack, 2-3 months old. She's been progressing fine after that. Maybe she's just slow waking up from dormancy.
Fermentation itself was fine, typically what you'd expect with a Lager. No detectable sulphur.
Here's White Labs' description:
This strain is ideal for producing malty lagers. Residual sweetness further helps promote malt nuances while contributing to a balanced finish.
The first generation of this strain can be slow, so we encourage using a larger initial culture or scheduling longer fermentation and conditioning times. Great for lagers with a wide gravity range including bocks, doppelbocks, märzens, Oktoberfests and American amber lagers.
Is it any better than 34/70?
Possibly! Just giving that extra, rich, complex maltiness maybe worth it. As long as you're not in big hurry to brew it.