Paid for a sub, the bot itself it fairly bad but the ideas behind it are fantastic.
Forcing the bot into 5 man premades and only 5 man premades is great for avoiding bans, and having Botexchange fill spots if you dont have the 5 accounts yourself is superb.
The bot isnt great, its more than likely going to feed but that shouldnt be a problem. You're playing against bots, you're getting kills once or twice a match and you're only losing matches that other bots are in, all Riot sees is that 5 people are terrible at their game but they're still learning. Its slower than scripting with something like Bot of Legends but you arent going to get slapped with a scripting ban in a week so its well worth it.
The site could use a touch up as well, getting logged out constantly and having to go back to the home page to log back in is annoying.
Eagerly awaiting the 6.20 update, would love an ETA on when thats coming.