I have several Sunrace freewheels in service and they have yet to fail, however I lubed them with Phil Wood Tenacious Oil before they were put into service. Had a Shimano freewheel freeze up once, flushed and lubed fixed it.

If you can handle a 24 tooth as a low gear, take the Shimano Mega Range freewheel and cut the 34 tooth off. I have done this twice and it works very well, plus gives a bit more space between the spokes and rear derailleur when in low gear.