Petty Theft is a great adventure spell, probably one of the best, and it works perfectly alongside Borrowers statlines and the strategy at play in blue tempo decks
As far as Standard is concerned, it's the best graveyard-disruption spell we've had since Tormod's Crypt was printed in the soon-to-be-returning Core sets, and it's strong enough that it actually serves the safety valve role quite well (a role other recent graveyard hate spells like Watchers of the Dead haven't been able to fulfill)
If you don't control five or more Towns at that time, the ability won't resolve and none of its effects will happen
The design and artwork of these cards are a crucial part of their appeal
Use speakerphone, show everyone the text, etc
Staying relatively small as a 2/3 is actually a bit of a boon, since The Ring lets it slip by larger creatures