I've heard of Jebo but I've never used one. I use mostly marineland stuff.
Jebo tends to be crap overall and I've heard bad stuff about their heaters, like heating up really hot and not kicking off. That can happen with any heater but I've heard it a lot with them.
Why do you need a 25 watt for a 3g? Does your house stay really cool?
You can get a Visitherm Stealth if you want a 25 watt. That's the brand I use in all my tanks.
Any heater is more effective if you have flow around it too, btw.