Building a quote calculator for service businesses - would love your feedback

I've spent the last two years building QuoteKit, a quote calculator that sits on your website and gives customers an instant price without them having to call or wait for a reply.

Built it originally for a courier client who was losing jobs because his competitors could quote instantly and he couldn't. Ended up building the whole thing from scratch including Google Maps distance pricing, automatic lead capture, booking requests, and a leads dashboard.

Launching tomorrow and would genuinely love feedback from anyone who runs a service business or has tried to solve this problem before. What did you try? What worked, what didn't?

Also happy to give anyone here free access in exchange for honest feedback.