Mostly positive, with bulbs in major use areas now replaced with a combination (as I experimented) of NxtGen bulbs from Simply LED (very bright - 50W equivalent?, light a bit 'strange' ghostly), Toolstation 94688 Halolite bulbs (bright, but not as bright as NxtGen, and warmer, closer to Halogen) and Robus RGU48LED 3W (brightish - 35W equivalent?, reasonable colour - between NxtGen and Halolite).
Negative is my experience with dimmable bulbs from eBay and Simply LED (older model, not NxtGen). Both these bulbs caused my broadband to fail due I believe to electromagnetic interference. I diagnosed it down to these bulbs by testing the broadband line and monitoring signal to noise, and noticed the line died and s/n detiorated to fail state when switching these bulbs (3 of) on in the upper and lower hall light fittings.
Hope this information is helpful to others.