I know a thing or two about Jagex, and my own account is worth a lot in USD. Given this, the most glowing reference I can give to any bot is if I feel 100% safe using it myself. As I speak I've just turned the bot off after about 10 hours of botting, in the whole time I've botted, I've got no black marks.
Last week when people were getting banned thick and fast and I didn't know why, I was scared a little bit about using myself, and would certainly not have left it for 10+ hours, including the times that J-Mods have been seen online in the past.
I don't think it's a coincidence that since all communications been secured, by 128-bit encrypting all RS username data there was only one ban and that was given to a player with the same RID and RS username, and since I've also 128-bit encypted all RID username data there have been no bans whatsoever.
It's as good as confirmation that Jagex were relying on hacking into your communications with the RID server to give out the 5+ black mark bans. While RID has lost a lot of it's reputation of being undetectable as a result, the fact Jagex went to these measures suggests they weren't actually detecting the bot, combined with the improvements in V3, and that there's been no bans since, it suggests the bot is safer than ever, even safer now than the first few months of V2 in my opinion.
It's not true that if you have had one half black mark offense the next one is a 10. Aside from the recent hacking of your communications by Jagex, there's never been a ban over half a black mark from this bot since V2 came out, and back then there were a few cases of people over-using and receiving multiple half black mark bans. If you still don't feel safe Speeman you can have a refund or you could switch the hours to another account, just contact customer support and they'll sort it out.