First set we got worked for a couple of days then half went out, the company were great and sent a replacement without any problems, highly recommend them for their customer service. But, bought these for outside at Christmas so we didnt have to put the old electric ones up, for first few nights they were great, lovely lights and worked well but they dont seem to charge up enough throughout the day to work again. We made sure we had positioned the Solar panel correctly so it was in full light but still didnt make any difference, never recharged enough to keep working day after day, dont think the rechargable batteries are upto much, quality wise.
In the end, we brought the batteries inside and recharged them every 3 days to keep the lights working so really was no different to having the old electric ones up. Think for next Christmas, we will buy better quality rechargable batteries and replace the supplied ones to see if this makes any difference.