The best indicator of future performance is past performance. And it's better to have reasonable expectations, even low expectations, that are exceeded than to have high expectations that are unmet (and often unrealistic).

Lonnie's most recent earlier history is the Kiss pin release. Many here expected Kiss, being a music pin, to be as good or better than ACDC and MET.... which is ridiculous considering that those two pins were coded by an entirely different person (Lyman). That obviously hasn't happened, so now there are some Kiss owners who have been slamming the Kiss pin relentlessly. Crazy as it's like cutting your nose off to spite your face. So if you expect/want MET/ACDC level awesome, or are sensitive to some owners bringing out the pitchforks down the line because AES isn't MET/ACDC level awesome, consider avoiding AES or wait and see.

Many other people have a more balanced view of Kiss. It is not Lyman epic, but it is reasonable overall... and deeper coded than most every 90's pin. Kiss does need another update to finish it (or get it close) and owners have been waiting far to too long for the next update. Another update is in the pipeline for Kiss and it should help make the pin even better, but (again) one shouldn't expect miracles (which some appear to be doing at their own peril for big disappointment). If such things are a problem, again it's best to avoid AES or wait and see.

If you think the Kiss pin is relatively reasonable overall, then strongly consider AES. Some people have noted similarities between Kiss and AES beyond Lonnie and Borg, even to the point of similar pf layouts.

Add in the other games Lonnie has coded significantly and make a decision on how much you like them.