Tokorozawa Station is pretty convenient...well, compared to the other stations on the Seibu Line. Both the Ikebukuro and Shinjuku Lines go through Tokorozawa, making the access into the city a bit easier.
Also, the biggest perk (for me!) is that the Limited Express 'Red Arrow' stops at Tokorozawa Station and it's only 20 mins from Seibu Shinjuku Station. Can't live without it.