In fact, a cheap high-speed VPN is useful for plenty of legal purposes. If it really costs only 5EUR a month, it's a reasonable way to secure your surfing at a public cafe -- provided you trust TPB.
Too bad, tor's latency makes it painful to use for daily browsing..
I'd be more concerned about the extremely high likelihood that your tor exit node is hostile and sniffing your traffic.
That's not too much of a problem. Or at least it's not a problem that tor pretends to solve. Once your traffic its out of the last node, it's considered public anyway.
Which makes it precisely terrible for the use case that started this thread -- safe surfing on public wifi.
It's way more likely that a bad guy is sniffing traffic leaving his tor node than there being a bad guy in the same cafe as you.