I really like Sparmax airbrushes. Have four to date of varying nozzle sizes. Great value. SP35, DH103, SP20 and my favorite Max 3. You need to thin Vallejo Model Air more when using - I use Vallejo Model Air with Vallejo Airbrush Improver approx. 1:1 due to the arid climate here. Tamya, MMP, Gunze, AK Real Colors, Ammo of MiG all work well (as they usually do with standard thinning ratios).
I like to hear about your experiences with Sparmax guns.
Sparmax brushes don’t get the love because they’re perceived as “lower tier”. They tend to get passed over in favour of the big name units.
I have an SP-35C and its bulletproof. My only dislike is the trigger button. The pressure needed to hold the air valve open plus the length of travel of the trigger makes long painting sessions very tiring on your finger.