There's loads of sites if you tap clonazepam into google - some users, some GP's, some addiction sites, I found a reference on oxford journals that clonazepam is thought to be a less addictive benzo than others.
I am sure as hell not saying everything on internet is true, hence why I wrote - I have read that - NOT it is fact and also - just because it is SUPPOSE to be - I am in no way stating clonazepam does not cause addiction, because it can and does, and there are some sites stating its MORE addictive - but I found a lot more stating it's suppose to be less addictive.
It is high potency like xanax however, xanax is fast acting and has shorter half life wheras clonazepam takes longer to kick in and has a much longer half life.
The faster acting benzo's tend to be more abuseable and w/d's from benzo's with a long half life are supposedly less severe than from benzos with a short half life.
It is also less euphoric than something like diazepam (from personal experience clonazepam induces no euphoria to me, diazepam does) - making it less likely to be sought and abused for this reason.
And, what I believe relevant to the OP - as he is taking to control seizures, Clonazepam is believed to take longer than other benzo's to build tolerance.
I am not saying at all that tolerance issues, psychological dependency, physical addiction, abuse and w/d's, but that everything I've read about the drug (I am a geek and spend hours gathering info on anything I am prescribed, from AP's to antibiotics) leads ME to believe the risks are LESS pronounced than with other benzos.
My reasoning behind believing this info, is that as a bipolar patient with a history of alchol and substance abuse, I am high risk for medication abuse, and believe my psych has given me - in her opinion - a medication with as low abuse and addiction potential as possible.
I would never say, I am 100% correct believe me, I am just an average joe offering my opinions and beliefs on meds I have/am using. These reasons above are why I reckon his prescribing doc felt it safe to treat him with clonazepam in the 1st place - it is what it is primarily prescribed for in UK after all, anything else such as my own anxiety/racing thoughts is off label use.
I would hope the OP would take all our answers with a pinch of salt, bear them in mind and do his own research. As already said, I would never proclaim to be 100% correct, and am very much open to information I've not heard and changing my beliefs and opinions should that info sway me.