The Surface Go, as a Windows machine for travel, does make sense. It's only real limitations are screen size and processor preformance. Battery life is good, but it's not an all-day device.
I've only had my Go for about a week, but find it quite functional. For me, it is mostly a comsumption/entertainment device, but it is serviceable for remote connections (via Teamviewer) to either my work iMac or my home Dell XPS box. The Go's processor hasn't been a limiting factor for me. My Ps and Lr work on the Go is limited to small web targeted images and not the 2-10gb Ps files that I deal with at work. Likewise, my doc and spreadsheet needs are modest, no massively complex spreadsheet calculations to bog things down.
I would HIGHLY RECOMMEND opting for the 8gb/128gb model. The storage is significantly faster; it's a true SSD as opposed to the eMMC storage in the 64gb model. Also, 8gb RAM will improve performance over the 4gb if you keep multiple apps open.
If you get a Go, I would recommend that you pickup a 45-60w USB-C charger so you can leave the low wattage Apple iPad charger and the special Surface chargers at home and have a single charger for traveling. The Go wants a 27w charger and, as I understand it, the charger for the new iPP is too wimpy for the job. If you're using an older iPP, there are 3rd party chargers that have both a USB-C port (for the Go) and a USB-A port (for a USB>Lightning cable for the iPad).