Yes if you like StarCraft II, enjoyed the campaign of WoL or still think that StarCraft II has promis.
HotS comes with content as large as WoL as far as assets goes. The campaign is atleast as extensive (although it is more hero orientated, focusing on Kerrigan) and Blizzard primised they would reuse as few of the assets from WoL as possible.
Examples of new assets that can be used in custom maps include dozens of zerg varients (like different types of baneling, zergling, ultrakist etc), many new Hybrid and a ton of decorations rangining from Terran surface to space cannon to huge geology.