OCWorkbench.com have posted a review of the VIA C3 733Mhz CPU. Heres a bit:
VIA C3 733Mhz's performance has improved from the earlier Cyrix processors. Although performance figures of both the Celeron and the VIA C3 are very low as compared to Coppermines, Durons, Athlons, in terms of price, VIA C3 has made a cheap and viable CPU for the SI. The low temperature is also a plus point which one can consider when selecting between a Celeron and a C3 as it will work on most of the existing S370 boards.