OK, here's what I learned about Simbots.
Reactions From Other Sims (and Simbots)
Sometimes when my Simbot tries to talk to someone, they run away in fear (or maybe surprise/excitement).
Most people my Simbot encounters tend to dislike him and give him a disgusted look, or run away. There are also those Sims that do the exact opposite and do a fist pump when they see a Simbot. The first time you talk to someone, they may refuse the greeting and you have to greet them again. It's very annoying. However on some rare occassions, Sims react "normally" to Simbots. I think its got something to do with traits?
It is equally annoying when a Simbot walks by a Sim who is doing something (sleeping, reading, writing, etc.). The Sim stops whatever they're doing (even waking from sleep), and goes "It's a Simbot!". I currently have 2 Simbots and they both react to each other in the same manner, sometimes at the same time. There are times this reaction doesn't happen, and it doesn't seem to have anything to do with befriending the Simbot.
Simbots for Tomb Exploration
Simbots naturally don't become dirty (due to some crazy engineering, or that they just don't mind). This is great for exploring tombs as normals Sims get filthy real fast.
But what about dive wells and steam traps? Aren't Simbots supposed to have an allergic reaction to water? Much to my surprise, Simbots can do both of those things just like normals Sims and only get the Soaked moodlet (which can be useful for disarming fire traps).
Also, correct me if I'm wrong, but my Sim got caught in a fire trap and didn't catch fire or get the Singed moodlet. I have 2 Simbots and neither of them have ever caught on fire. I'm not sure if Mummies are any different.
I have yet to test them with electricity traps, poison traps and mummies.
Reprogramming and Repairing Simbots
After making a new Simbot, I like to reprogram it. So I send it to the shower where it gets short circuited. (O, Simbots can also short circuit if one or many of its moodlets drops too low.) Simbots stand hunched over for about 4 hours and then reboot themselves to return to normal.
After the reprogramming, I will repair the Simbot. Unfortunately, both times I did this my Sim got electrocuted and caught on fire. Again, the Simbot did not catch fire. My Sim had a high level handiness skill and yet she got electrocuted. It's really strange.
Just some of my observations. Hope it helps someone.