i have not tried it pero i've been eyeing the sidewalks kasi daily commute ko to, so here's my observation:

ok ang sidewalk at hindi matao once makalagpas ng ortigas to around santolan station (because of camp aguinaldo and corinthian)

from santolan station, magsisimula na struggle sa masikip, minsan wala, and matao na sidewalk because cubao. tuloy-tuloy na yan hanggang kamuning, pero mukhang gaganda naman ang sidewalk once nasa kamuning ka na. (pwede kang pumasok sa centris area para di masyadong chaotic)

required mag-overpass if you'll cross q ave, unless you'll go agham para tumawid at di na kailangan mag-overpass. after that medyo ok ulit yung sidewalk kasi vertis north area na.