It's not cheap, and yes you could buy it cheaper, however, the connections are crimped well, and heat shrunk well, if you take into account the tools and time, it's a fair price for a plug and play solution.
My 110a has only been charged once, briefly after a few days of having the s/c system fitted, as I wanted to check how good it was. had it on about 10 weeks now, and not charged it after the first few days.