Hi,
I have ordered and received a stronic eins. The stronic zwei seemed too huge to me.
It is not designed for anal use, I guess because of the risk of insertion of the whole thing inside but I think it would be difficult to loose it inside, because of it's dimensions.
Even if it is smaller than the zwei, it's not a small toy.
I had the opportunity to have a short test.
Its curved at his extremity, that's nice to reach the prostate once inside.
The first 1/4 is flexible, after that's more rigid, because of the engine that can be felt under the silicone.
The initial diameter is 3 cm, which becomes quickly 3.5 and 4 cm.
When you put it on, you can feel the pulsation. It's a small motion of back and forth moving, really impressive, not a vibration.
Different rythms can be selected.
I could insert it without problem and wihtout hurting, feeling the head reaching my prostate.
Then I activated the motion.
I can tell you that the sensationi has nothing to compare with other vibrators.
It's like being fucked by a litlle allien

It's really pleasurable, as for the sensation inside and on the anus.
I had to search how to better reach the prostate by manipulating the handle of the stronic.
After 1 or 2 minutes small drops of precum were dropping out without touching my cock at any moment.
But I had to stop as I had very few jelly, too bad !
I'm sure the next time, with the right quantity of jelly, I'll go for something interresting.