The abilities granted to characters are mostly random, lack any sense of logic, and don't contribute to the story at all, which is already weak.
Every episode, something goes wrong so that the esper team has to deal with. But since the arc of the Strip Lady who tried to save the her Error Children, it's always the protagonist Railgun that has to reap what she sows, handling problems one after another created by fault of her own immaturity, naivety, etc. (I want to say stupidity)
Overall, all characters are weak in all ways, childish, spontaneous, fanatical, etc. even though they presumably possess great skills and knowledge in a futuristic world, e.g. hacking computers (lolz). Moreover, there is no particular growth in their personalities throughout the show. The character Saten may look like playing a triggering role in one or two arc(s) but her contribution to the story remains next to nothing.
For the espers, if you think about it, if you were in their shoes, you could even use those abilities in much better ways, you bet. Therefore, there's no feel of optimism or logic in both the flow and details, thus this isn't worth any entertainment value.
3/10
