I've placed 6 or 7 orders at SVC in the last few months, for a variety of items (fans, cables, AS-III, cathodes, etc.). Up to the last 2, all my orders have shipped in a reasonable time and been complete and undamaged when they arrived. Of the last 2, one is in the hands of UPS, the other is still pending. I'm satisfied with them thus far. *shrug*
As for USPS Priority, no signature is required. The round cables and thumbscrews (blue and green tinted, and when they say "tinted", that's exactly what they mean. not at all as colorful as the pictures implied, but they definitely have tints of blue and green, so i can't really say i didn't get what i ordered) I ordered 12 hours before they decided to have a sale (they plan this kind of thing, i swear they do) were shipped Priority and waiting on my doorstep when I got home from work on Monday.
UPS hasn't bothered to ask for a signature from any of the shipments I've received (from any online merchant), either, for that matter. Of course, since I'm only home to sign for packages on Wednesday and Thursday mornings, that's a bonus for me.