This kind of workflow makes it highly inspiring - whether you use the effects just for monitoring or print them on the track while recording or later - it's all your choice. Using a vocoder with your midi keyboard and hear the results without delayed voices in your head? That's where the Apollo really shines. Want to hear your guitar with cabinet simulation and be inspired by real time echo and modulation? No problem at all. The feature that makes Apollo Twin USB a real game changer are the realtime monitoring capabilities without the use of external gear: want to provide a mix ready monitoring 'zero-latency' signal for vocals with compressor, EQ and reverb while at the same time recording a dry signal to the DAW? No problem.
I have used many audio interfaces ranging from budget to professional levels.
It really makes a difference - probably much more than you initially think