I've been buying stuff from S4p for about, I think, 8, maybe 9 years now - first big order was when I did a complete rebuild of Becky's (2010 Panda) front suspension. I decided on them partly for the prices and partly because I read so many good reviews on here. I made a
donation to the forum and got the discount. I was a little anxious when all the parts arrived with brand names I'd never heard of and sounded quite strange - Original Birth anyone? I'm not in the market for nappies any more! However it all seemed to be solid stuff so I used it. Now, all these years later, I've not had to renew one single part yet, not even the coolant thermostat (original birth) which I replaced a year or so later when I did the cam belt.
On several occasions I've rung them asking for info and parts identification and they're always very helpful and friendly. For everyday service items, oil filters, air filters, engine coolant, and stuff like that I tend to order from my local factor but for parts like shock absorbers, maybe a clutch kit, timing belt kits, etc -you get the idea I'm sure - I always check with them first and often find they are worth using. You need to have a big enough order to qualify for free delivery though in my opinion. But yes. good people to deal with and I unreservedly recommend them.
