Hi Zymon, thanks for posting some examples! Well it seems that you have a very different idea of what's a "simple" model than I do since I'd consider almost everything you posted to be complex and highly detailed. MoI won't be very good at making things with high frequency bumps in it like it looks like you need.

Probably ZBrush is the better tool for you although one thing you may want to explore is using MoI and ZBrush in combination with each other, building your base forms with all smooth surfaces in MoI and then bringing them into ZBrush to add detailing.

- Michael