Well I'm not the only one using P7 succesfully in Linux - far from it. There are many other users in this forum as well.

As to what I have encountered:
-Installing P7 in Ubuntu succeeded merely by clicking the setup.exe (or wharevet it was called) just like in Windows
-Installing the service packs did not succeed ... I did it by installing the service packs via a virtual Windows (and then just replaced everything to the service packed version in Ubuntu)
-DAZ Installers are a bitch ... I sometimes need to install content via virtual Windows if the installer won't work in Wine for some reason. The older installers work just fine, but the new ones ... not so much.
-Poser just runs. I tweaked Wine into giving a full screen window instead of the windowed option, but other than that I did not need any tweaking to get P7 to run.

The quirks of use:
-Heap space becoming full is an issue and one that is probably not going to go away either (low priority in the Wine development queue). This manifests itself with menus disappearing or not responding when heap space comes full. This only happens with a HUGE number of directories (Poser creates a 80-byte menu signature for every directory available via the library palette; if this directory number exceeds around 4000 or so, heap space becomes an issue). Not likely unless you have it like I have: meticulously sorted directory structure to every content item. I mean I have one huge Runtime with everything in it and so the directory structure is ... complex. Ie. to get to a V3, I have this in my library - Character-->HUMANS-->DAZ-->V3 and under that directory the actual V3 Cr2 resides.
-OBJ import sometimes fails (I don't know why)
-Selected body part has an annoying red border (this doesn't happen with all models though and it's more of an annoyance than a real hindrance)
-Floating palettes disappear behind the main program window (this is avoided by just resizing the main window to a small enough window so as to make the floating palettes stand on their own - for example when I work with Poser, I resize main window to about 500x500 pixels in the lower left corner just big enough to house all the controls and menus and all the important floating palettes are now usable and stable (library palette, render screen etc). No problems, but it requires the user to adopt this one extra step of resizing upon startup into his/her workflow.
-Hierarchy window seems to act real slow for me (no idea why)

Pros:
-Access to Linux filesystem. Linux filesystems kicks Windows filesystems in the nuts painfully (I mean this is hardly under a debate ... it's a fact). This in turn means superior load-up times (when Poser browses through everything) and file reading speed with big files.
-Access to Linux command line tools. (Anyone who knows how to "grep", "awk" and "sed" through their Runtime, find that many painful jobs in Windows are just a few commands away in Linux). You need to find orphaned OBJ files? No probs, just a few commands. You need to change all texture references for a 100 files? No problem, just a few commands. Etc etc.
-Rendering speeds seems far better than in Windows
-Access to Linux tools for backups etc. I mean who needs to manually back up their content anyway? Put a "rsync" script or "mirrordir" or something in cron and let the system take care of menial tasks in background.
-Python is fast.

Personally ... no way back to Windows for me. Poser works good enough, reliable enough and fast enough for my needs (which are the daily needs of serious hobbyist). I have an external Runtime in Linux ext2 filesystem and a main Runtime in Linux ext2 filesystem as well. Apart from that I have a virtual Windows installation that has mounted access to the external Runtime in Ubuntu (I needed this to get the service packs working and to install V4 and M4 - otherwise it's just there sleeping).