This could potentially be the kind of PIM I would hope for.

Its looks, interfaces, and functions earned itself of my 3-star rating.

1.5 stars are lost for being so buggy. During period of my 3-hrs testing time, it crashed once and froze twice.
The crash happened when I moved 2 notes.
Qu-s's process was up to 80s% of my CPU and hung there for almost two minutes, and then quit.
These kind of bugs make me nervous of loosing my info. Some of which are too precious to leave in unstable hands.
Other bugs are, text format and their short cuts which only work from time to time,
and etc...

All bugs mentioned above made me feel that $16.95 is too pricey. That's another half star off.

Here, at macupdate, I used to pay $50 for a bunch of mature and very stable apps.
Some of them I've been using as shareware without time limit, which I'd be glad to pay for them.

I know that developers need to make their livings too.
However, a lot less money and a longer period of trial version would attract more users who would help you id your bugs,
and help your app grows faster.

Before that time comes, I would hold my breath and choose not to pay for this app, just yet