Used Bresser 152/1900

So i recently bought used bresser messier mc-152/1900 exos 2 goto set for 750€. Was it worth it or no?

Everything seems to work fine. What tests should i do?

What should i know about that setup or any tips how to handle it better?

Also got:

EXPLORE SCIENTIFIC 82° Ar Eyepiece 14mm (1,25") EXPLORE SCIENTIFIC Nebula Filter 12nm, 1.25\" O-I|I EXPLORE SCIENTIFIC Teleextender 2x 31.7mm/1.25" EXPLORE SCIENTIFIC Filter set 3 moon and planets from 150 mm (6 pca \") Apert.