Thank you for the feedback. Here is a screenshot from one of my projects. I design surveys and deal with groups of response bubbles that I need to place so that the center of each bubble is exactly on top of the intersect of the guides. This is a screenshot from Illustrator.
And here is a screenshot from Designer. I can position an individual bubble perfectly over the guides. Designer shows me a red and green line when I have centered my object, which is exactly what I want to do. But when it comes to positioning a group of response bubbles I have to eyeball the positioning of my group of response bubbles and then adjust the position of each individual bubble to get it perfect.
BTW, I also noticed that when I open the PDF I created in Illustrator, a filled circle with outline becomes a white (filled) circle without outline and a blank circle with outline. Different issue, just felt a need to voice it so I can now move on with my (design) life.
In any case, from the responses I gather there is no way for me to perfectly align my group of response bubbles. Thank you again for your replies.