First Spear hasn't really been producing for the general public under their own brand for long enough to have wide-spread experiences.
They have been providing OEM services for a bit longer, so many people own FS-built gear and don't know it. Industry professionals like Eggrolly have had good looks at the gear and say it's GTG, as anticipated.
The CEO of FS is Scott Carver, who was really the driving force behind Eagle, as well as the designer of many of their most popular products. He's the kind of guy who you can go "all-in" with before you see the kit, provided it fits your mission. Build quality won't be a question, but you'll be hard pressed to find anyone with first hand experience with the gear, especially for any time frame worth judging.