It was mathematically proven that software can't be perfect, but it seems to be running ok. The script buys all required items and quests are done in the order you select them on the GUI, all you need is money on the account. You can start anywhere, but somewhere around falador/lumbridge/varrock might be a good idea since it will likely have to go to GE.
Alright, if you have any issues just send me the logger contents and I'll take a look at it