'Artscroll' provides a detailed informed commentary along with the translation in English and the original facing Hebrew text. I do not davven with the 'Artscroll' but have it with me when I want to look up the meaning of a particular phrase, or deepen in the understanding of a particular sentence or paragraph. This commentary enriches the whole experience of the 'Davvaning' although I might add that on the High Holidays the commentary is secondary. i.e. One must not allow oneself to be too distracted by the commentary and turn away from the prayer.
Still for me this Machzor is a help in understanding and feeling the meaning of the prayer.
Shanah Tovah v'Gmar Chatimah Tovah.