It depends on what you mean by good. The Volvo C70 ranks 19 out of 21 for an upscale midsize vehicle by US News. Volvos in general have always had a good reputation.
Yes the c70 was in production from 1997 to 2000 after the 840
The 2010 Volvo C70 has 20 valves.
The 2009 Volvo C70 has 20 valves.
The 2013 Volvo C70 has 20 valves.
The 2002 Volvo C70 has 20 valves.
The 2007 Volvo C70 has 20 valves.
The 2006 Volvo C70 has 20 valves.
The 2001 Volvo C70 has 20 valves.
The 2003 Volvo C70 has 20 valves.
The 2012 Volvo C70 has 20 valves.
The 2004 Volvo C70 has 20 valves.