I bought this piano a few weeks ago,and my firt impression was like:"Omg,is this for 154Eur?" 
First of all,quality of the Digital Piano is really great,no suspicious sounds,when playing,keys are smooth,lightly wieghted as described. 
Secondly,the sound is much more better than I thought it would be. 
The speakers are loud enough for a medium room,sometimes it was too noisy,so i had to turn the sound down from maximum. 
Basically it's Thomann SP-320,just wtihout 15 keys,it is the same. 
I would recommend it for a beginner,although,better save up some money for DP-26,but if you don't want.or you have just enough money for that one,you won't be dissapointed. 
Ling Ling approves