In my experience OSR can provide a boost to building colonies in Spring.
If the conditions are half decent I can get a good crop from OSR.
Personally I like softset honey produced from this crop but I personally believe that although the majority of the nectar is from OSR the bees are not as stupid as some humans and collect from other sources at the same time so every year the Spring crop can vary depending on what is in bloom and giving nectar at the time the OSR flowers.
The positives:-
- Early crop - source of both nectar / pollen help to build up colonies.
- Makes excellent softset with a creamy and almost velvet texture when made correctly.
- For some years when the conditions have not been best during the summer the Spring crop (OSR) has been my only decent crop!
The negatives:-
- Can help colonies build so fast, early swarming / management is required.
- Knowing when the crop is ready for extraction requires some management / experience otherwise it's quite easy to end up with a lot of granulated frames!
The above is my opinion and I would say everyone is different and having manned a tasting desk at a Honey show for several years I found that there seems to be an equal split between people who prefer runny honey and softset honey.