Very good. However, I would consider this to be more of a fruit spread than a jam. I used frozen Rhubarb/Strwberries and added the whole box of pectin and another cup of sugar as I thought it would be too runny. It thickened up but not like a true jam. Aside from that it is very good and I could eat it by the spoonful. Will make again and try it with fresh fruit to see if that makes a difference in the consistency.
I did not have any luck with this recipe. I have a very loose 'spread' as my jam did not set. It taste good - however, the lemon used in this recipe tends, in my opinion, to overwhelm the tartness of the rhubarb. It taste more like Strawberry Lemon Jam. The jars all sealed well and are now in the pantry - just did not get the 'jam' texture.
Super easy for this first-timer. I ended up adding 2 more tsp. of pectin as it was a bit runny. It tastes great!