Ficus benjamina can get a bad rap in some circles as unsuitable for bonsai, but I personally disagree. They're unlikely to make a show winning tree, but they are SO MUCH FUN to work with!
You'll notice when you repot that they have a tendency to grow fat, tuberous roots. In nature these help saplings store resources for the dry periods, but if you you keep the soil moist enough (but not enough for root rot to set in) they'll never feel the need to save up. Using a hard inorganic substrate can help with that too.
They also tend toward apically dominant growth, meaning whatever branch is topmost will be the one that takes off, sometimes letting other branches die off in favor of the apex if you don't keep it in check.
They have a reputation for being fussy. This comes from their habit of throwing off all their foliage when moved for the first time in a long while. Just move it about now and then to keep it from growing leaves that are too specialized to one location, and you'll avoid this. If it does happen, just continue to care for it normally, and it will regrow a new head of hair in a month or two.
Another thing to keep in mind is these things don't make rough bark at all.
Otherwise, they can grow quite fast (leading to the relative high maintenance some people talk about) and have wood that stays rather flexible even when mature. They're tolerant of a wide range of soil types and moisture levels, as well as light levels and humidity.
The wood can be springy and sometimes pop right back to it's original position when you remove any wiring. I find that using weights or guy wires works better because of this, but benjamina also respond wonderfully to cut and grow techniques.
If you leave wire on too long and it starts to cut in, it's not as big a concern as on other deciduous trees. That springy wood and fast growth will smooth it right out.
Another thing to remember is these things don't make rough bark at all. Cute, scrape, gouge, whatever; it'll heal over with fresh, smooth, soft bark every time.
Work them when they're actively growing. Pluck a leaf, and if you see the white sap flow, go for broke.
I don't recommend cutting a branch back to no leaves left. It's likely to just abandon the branch.