Looking into wheels, have questions

Is anyone running wheel adapter spacers? The shop I'm getting tires from has those wheels at a decent price. I know they're a knockoff brand and not the best, but I'm not putting low profile tires on my car and I have stock suspension currently with plans of maybe doing springs down the road.

So my questions are for those of you using the spacers, how are they? How long have you been using them and are there any problems.

And does anybody know what the fitment would be like? I've tried using "will they fit" but it doesn't really help me get a visual.

New wheels are 18x9.5 +38 5x114.3 Tires are 225/45/18