Not bad. Think it would have been better with a different blood type.
[She's kidding. Mostly. Other than the faintest of copper tastes leftover on his lips, she hadn't really tasted it. That dark, secret part of her that had enjoyed being a vampire had responded to the taste, and Spike might be aware of the fact her heartbeat quickened a moment. She kept that part locked away deep down.]
In all seriousness, I'd say Ianto and Jack are both incredibly lucky.