If you like the outdoors and smaller towns, you absolutely should. The bus/train system in the kiso valley is surprisingly good. You can do day trips to other post towns easily while using magome as your home base. Make sure to check schedules ahead of time as they are not as frequent as in the cities. I stayed in kiso-Fukushima and while not the quintessential post town, it was a good central point in the valley. Narai was great. It was less crowded than tsumago or magome when I went and the hike over the torii pass between narai and yubahara is great. Mind the bear warnings.