In case it hasn’t been said already in this thread: Sure, might get tricky with off the grid notes and/or swing and could require to go over the recorded material and do some corrections, but OT´s resolution (microtiming) is 1/384th of a step, so not that bad for a step sequencer.
If you set global quantization to off:
You can quantize notes from the trig edit menu (IIRC you can hit yes six times until notes are fully quantized):
If your DAW or another sequencer is synced well with OT, you can record midi on the fly. It works pretty well and simple on-the-grid material wouldn’t need any corrections.