It is out of stock online at Home Depot - the major source for this tool.
There are mostly positive reviews about it on the Home Depot site. That said, I find online reviews (especially at HD and Lowes sites) to be a bit unreliable. Often they come from one time users who are not very demanding of their tools. But for $70 its might be worth a try for light-duty work - should it get back in stock. Planing, sanding and grinding can be very demanding tasks for a cordless tool - and depending on your needs - you might be better off with a corded tool. HD sells the corded Ryobi for the same price:
Other cordless planers from Bosch, Dewalt, Makita and Milwaukee seem to sell in the $160 to $200 range and as far as I know - all use a 3.25 inch wide cutter . I have not tried any of these. My go-to powered planes are both old corded Porter Cable models - and we also used much larger power planes from Mafell, Makita and Virutex. A new cutter head for the PC 126 (part #873096) costs around $100 - more than the Ryobi Planer - but blades for some 3.25 inch planers seem to sell for under $20. The odd thing about the P610 is that it does not seem t be listed on the Ryobi web site - so you can not look at an online user's manual or parts diagram to see if replacement blades are even listed.