I like my Bosch 10.8V drill, impact driver and multi-tool kit, too. They're fairly well made (not a patch on their older stuff though). I'm not criticising the quality of their rail saws at all.
It's an annoyance that I can't get 3rd party batteries, especially when almost all brands use identical battery technology. It (and the rail design) is more a reflection of their "lock-in" marketing strategy than overall quality.