More than I expected ... first, then the disappointment :-(

I can not confirm the supposedly dark display. You can lighten but under Settings / Display. But still seems bright enough in the basic setting.

Not I can confirm the alleged long charging time. Compared to the charging time of my Samsung Galaxy S III mini, - I find emotionally no difference.

I can not judge about the power consumption for a day. Emotionally, no longer, (abchecken surfing, library, E-mails, etc.) as with my Smartphone in normal operation.

For me, this tablet comes mainly for the DSLR-control is used. Since I need to an OTG-enabled USB output, this option was first priority.

Yes it works without crashing the tablets and is also not too slow what I was afraid at first. For this I use the app qDslrDashboard in beta version from the developers themselves (not in the Play Store to install, out of date), in conjunction with the TP-Link TL-MR3040 3G / 4G wireless router.
Should I not be sufficient power reserve, I can an extra battery via USB port provide the tablet with energy when wireless transmission to DSLR camera.

Also suitable for the App of Helicon Focus Pro, with USB host connection (OTG) for DSLR (perhaps soon possible with wireless transmission).

For wireless connection of the power consumption of the tablets has risen noticeably, while it came in range of the camera lens for increased warming, but not too hot. After about 3 -4 hours of DSLR camera, the battery status went fairly down to about 15%, in the WLAN mode with the TP-Link TL-MR3040 3G / 4G wireless router. For me, not really disturbing, because I could still use an external 16.000 mAh battery as a reserve. Plus a tip: In flight mode, extended event. the operational phase in wireless DSLR camera operation.

About the scratch-sensitive display, I can not say anything at that. I therefore used the above case with stand when to display pin, also the open slot for Micro Memory Card is somewhat protected and I do not worry about it. The Berührempfindlichkeit the display responds normally.

The image resolution is surprisingly good. The photos that I likened to Flickr.com with the desktop were as sharp crack.

Conclusion:
For about 85.- Euro there is really nothing to complain about for my specific purpose. From the feel of the tablet is very satisfactory. One can even say, good to very good in the picture quality. Just for the DSLR camera control, I wanted no tablet in the price range between 300 - invest up 500.- Euro.
Not only for the DSLR-control, but also in wireless mode for "home use" it will be more in the future come to use when my smartphone.

For this price / performance ratio I give like 5 star.

Regarding the power consumption, the charging time and display sensitivity I give later further my experiences.

Update from 20.12.2014.:

With regard to battery performance Here are the results of the unloading and loading time.
In standby mode (display off), the battery from 100% to 18% entladete after 168 hours (7 days).
With the enclosed charger the charging time by 18% amounted to 100% after 2 hrs. And 10 minutes.

Update 28.12.14:. The display sensitivity on websites only partially functional. On Web sites with the touch on the submenu, it can be with the best of luck and skill, the sides call. Despite screen magnification no improvement. On the edge region of the tablet displays, it is also less functional.

Update from 01.18.2015.:
Today, the tablet can not boot. Android and Trekstor logo show up briefly, then only the loading process "Android ... in loop. Battery is full and does not want to anymore. The operational phase two also eased the boots striking for more and more. To three hours, then it went quickly down direction "0"%.

Vowed to fast and join in the other negative reviews on. Unfortunately, only 1's star from previously 5 stars for the too fast vowed part.
The return in guarantee arose from the seller no problems!