Ok It is icones driven interface hard to remember (some like it ,some not) but TS has lots of features and  it is powerful  ANd  now it is free (i have payed before to have it)
Dont forget to download the courses and the big manual
For rendering it is basicly DX9  and real time display renders But using VRay (you must buy) the render is excellent
Load and save many formats Dont forget to install Luuv plugin (included) for obj format