It looks very cool. It doesn't seem to have any summon spells at these levels, but a lot of wildshape goodies.
Also, it seems to be a primary controller but with secondary class roles. Strange, but fair enough i guess.
Can someone compare it to the druid-clone in the advanced players guide?
I'll hit some of the basics here:
APG's "Nature Priest" is Divine instead of Primal, and emphasises CHA more than DEX. Both classes use WIS and CON.
Nature Priest gets Light Shield Proficiency, WotC Druid does not.
Both classes get Simple Melee weapons; WotC Druid also gets Simple Ranged, while Nature Priest gets handaxe, longspear, and sling instead.
Both classes can use Staffs; Nature Priests can use Fetishes (treat them as magic Wands), WotC Druids can use Totems.
Nature Priest is less hardy: 10 + CON score HP, +4 HP/Level, 6 + CON mod. healing surges/day (rather than WotC Druid's 12, 5, 7).
Nature Priest Skills List has Religion instead of Arcana, Dungeoneering instead of Diplomacy; total of 7 Skills instead of WotC Druid's 9 Skills.
Rituals: Nature Priests get +CHA mod. to Nature checks on Nature Rituals; but it is not stated in the APG that they start play owning a Ritual Book.
Nature Priests have a choice among 5 At-Will Prayers: one each doing Fire, Lightning, Thunder, Poison, or Cold damage, all attacking FORT or REF.
Nature Priests may quickly run out of Minor Actions to sustain their powers: 2 of the 4 Level 1 Encounter Prayers are Sustain Minor, and 3 of the 4 Level 1 Daily Prayers are Sustain Minor, and 3 of the 4 Level 2 Utility Prayers are Sustain Minor, and 3 of the 4 Level 3 Encounter Prayers are Sustain Minor. . . .
Nature Priests do not Summon; they Conjure, instead. The conjured effects have no will of their own, and generally can neither make Opportunity Attacks, nor flank (because, with no OAs, they don't threaten on the enemies' turns), unless explicitly allowed to do so in a specific prayer.
For further confusion, there is also a "Druid" class in the book "Forgotten Heroes: Fang, Fist, and Song" from Goodman Games; it gets Animal Companions (choose one and stick with it); Wildshape 1 per Tier per Day, into different shapes for different purposes (or even "Porpoises"); and could learn to Summon Treant at Level 5 (lasts until the end of the encounter, so you don't actually have to sustain it). This FH Druid uses the Summoning keyword, but I haven't seen where that is defined yet; it is explicitly stated that the summoned Animal Companions can be destroyed with a single hit (modified by luck); but the FH Druid can simply summon a new Animal Companion next encounter. (Disposable Animal Companions: Affinity with Nature or Callous Exploitation?)