I use Sonic RecordNow v6 (Dell OEM version), although it's easy to use it lacks many features some freeware alternatives have.
A free alternative which I use is burnatonce. It doesn't contain any ad's, spyware, or any malware.
Caveat: If you're going to use burnatonce I'd recommend you have Windows 2000, or XP as your operating system and to use the SPTI interface via (Options->General), it's the Win2k, WinXP built in ASPI layer. I don't recommend using it on Win9x systems since it may or will have problems running on Win9x systems for various reasons -- one being Adaptec's ASPI layer and its bugs.