I'm using the M200 mostly to produce mechanical parts and here are my findings:
1) Everyone that already have a 3D printer and gave a look at my made parts agreed that the M200 prints quality is near perfect. Recently I printed some parts for the Falla3D project for a 3DHubs order and all the parts snapped perfectly togheter without any extra step, even if the parts were made in different printing jobs and some were made in Z-ABS and some in Z-Ultrat.
2) PLA and other organic materials can't be used in production and will degrade soon. Nylon often clogs any extruder, Ultem is quite expensive but as Zortrax said they are considering if it can be used in the M200. Wood and other materials are mostly for aestetichs and design. ABS instead can be used for production, can be further machined, sanded, polished and the M200 does a great job with it.
3) The M200 is a click and go printer. You won't go mad with parameters, Most of times it makes the prints you need out of the box, and is a good choice for those that need a 3D printer to produce more then to play and mod with it.
4) It is fair easy to maintain and once you'll have understood the way it has been made all the problems you can face will have some tutorial to solve or an answer (sooner or later) by the forum or the support team.
1) Warping, curlings, burn marks: Z-ABS is almost a standard ABS and so you'll have to deal with warping on large parts. Enclosing the M200 on the 3 open sides will help a lot the print to stay flat. Also it is very important to let the print cool down on the bed for a fair amount of time after the end of the job, I usually let it cool down until the heated plate is completely cold, even 1-2 hours if needed. I never had until now detachements of the prints from the bed even if I didn't use yet any compound on the bed (it is just like it came from factory). It seems that latest M200 beds stick prints quite better then first series. To end with there are a few situations in which Z-ABS produce brown marks like burnt spots. I'm still investigating but it mostly happens near overhangs when supports are used. Z-Ultrat has less warping and curlings, it is a very hard material, probably loaded with PC but in truth I try to make everything with Z-ABS because it's easier to finish.
2) The software: I'm sure that Zortrax is trying to make it's best to improve the software that is still in a beta stage, but a lot of improvements need to be done. There are many errors in the way Z-Suite "sees" the piece and it can lead to errors in the prints at various levels. You'll have to closely watch to each coded layer in Z-Suite to understand if what had been made can really be printed without problems. This is the biggest step that Zortrax can do to improve the printer, focus on the software development before announcing new printers.... we need a software we can work without problems and we can trust on!
3) Cost of produced parts: Since the M200 uses proprietary filaments, they are someway more expensive than the market price for similar product. A spool of Z-ABS is about 800g net and is priced 27 Euros + VAT. You can find similar filament for 30% less but it's not supported by Zortrax and you'll loose the warranty if you use it. Z-Ultrat is even more expensive at 42 Euros a spool and in my opinion should be only used in parts where severe warpings can't let you go with Z-ABS or you need extremely solid and hard pieces. Z-Ultrat is less prone to sanding and further machining then Z-ABS.
To end with I think that the M200 is an excellent product and on level of top famous printers like the Ultimaker2 or the Makerbot but with the extra of easy usage. I seem to have read that the 2015 M200 is nothing but an enclosed M200 and the firmware/software for both will be same. Rafal already stated that M200 will still be the top of the consumer line for next year too.