Good scan for RW media considering it's scanned in a 3540. :iagree:
Expectations for non-RW should be a little higher though if you want to select high quality media, mainly less PIFs totals, though the figures here would still be perfectly acceptable.
From the quality score, I see that this scan was performed @8ECC, so max PIF (PI failures) should be 16 (not 100% correct in theory but this is not relevant here). With the 3540, the limit for PIEs (PI errors) is impossible to determine, as NEC drives don't report PIE according to ECMA standards. I've arbitrarily set the PIE limit to 500 for my own 3540 scans, but its doesn't mean much, and anyway to select good media I prefer PIE levels to stay under 80 in 3540 scans.
A simple way to help you to have an idea of the quality of your scans is to set CDspeed to "use background to show error limits" (in the options). Then when looking at the PIF figures (bottom graph), most of the errors reported should stay in the green zone, a couple of single spikes in the light red zone are acceptable, spikes in the dark red zone are a concern, and larger areas of errors out of the green zone is an indication of poor quality.
Interpretation of PIE/PIF scanning is actually much more complicated than this, and depends a lot on the drive used for scanning, but you can first apply this simple method with your 3540 and, if you're interested in going further, read the threads in the Media testing / identifying software section..
As you own a 3540, an alternate method to test your burns, if you don't want to bother with scanning, is to perform a transfer rate test. A perfect reading curve, without dips, means the disc is in good shape and can be read perfectly.
Small slowdowns are acceptable, dramatic slowdowns are an indication of poor quality.
For this method of testing to be relevant, you have to set the transfer rate test to "accuracy" (options), and to perform the test without any background activity on you PC.
Happy burning and testing