I bet you can fly with it, just as everyone else who use it on youtube. But judge for yourself if the frame is something you like or not.
It's a Radne raket engine, they make them in Sweden, and a lot of paramotor brands have them, or had them. My personal opinion is that I don't like the high rpm. But I know others who like this engine. It have a good power/weight ratio, but so have other new stronger engines, and I would aim for higher thrust. Even if it's not needed for regular cruising in the sky.
Just look at the Nitro 200, if it can earn a good reliability reputation (so far, so good), I have a hard time believing pilots would want something much different.
Radne however are cheap and easy to take apart from my understanding. Similar engines are sometimes double the price of the Radne. https://www.radne.se/Product/3201-10/Raket-120-Aero-RD
Read the manual to get an idea, then compare it to other engines. https://issuu.com/radne/docs/manual_r120
About the Flattop cage, I've never tried one, so I can't tell you if it will save your life if you fall asleep and crash land, or if it is the best paramotor ever made. But the claims for this thing is pretty high. If Dell gives you a really good price, maybe consider it.
I personally don't care about "crumple zones" and designs like that, I still have my legs and feet, and if I somehow loose them, I buy a trike
I would either buy the lightest cage I could find, something miniplane-ish with titanium like the air conception, but there are others. Or something premium ultra sexy with lots of carbon like the Scout and Adventure X-Race if I had to buy new today. But that's not the topic.