Of-course while choosing more days will yield better results and recovery, we recommend choosing the number you are realistically able to stick with. You will get worse results by choosing a training day commitment you can't be consistent with than if you choose a lower weekly number of training days but make all of the sessions every week. Two days a week is better than one day, and three is better than two. Progressively adding more days, likely leads to improved gains but it begins to offer less advantages the more you add. Meaning the more you add the less additional improvement you gain.