I've had my SR+ almost 3 months now, and all of my charging is done at public points so have used most of the providers.
In regards to PodPoint, i've found them pretty reliable. Only on once occasion has one not worked. I love the free ones in the Sainsburys car park near me, so handy having them there even if the spaces are often ICE'd.
Polar is my main source of charging and i've found them pretty hit and miss to be honest, my issues are:
- Contactless is very unreliable. I've had many failures using just my bank card before my Polar card arrived.
- Often find chargers that are out of service, and even if you ring their helpline and wait AGES to finally be connected, they say the point isn't responding and a technician needs to be sent to fix it.
- Not once have I ever got 50kw from any of their chargers. I've used two local to my flat, one local to my office and one in Derby, not a single 50kw got more than about 40kw. Most of the time its 20-30kw.
- The units are placed at the front of bays, not the middle or back. This is fine if you're driving an e-taxi or Nissan Leaf which charge from the front, but for a Tesla you have to get creative with your parking. You have to reverse in against traffic. This also means some charge points can't be used at all - like on a dual carriage way.
- The cables aren't long enough. One of the points near my flat has a shorter cable than all the other units i've used, and doesn't even reach the car when parked in reverse!
That being said, the Polar network is massive, and I love that you can use all CYC chargers with a Polar card. Went to Manchester last month and was able to use all of Manchester council's EV chargers free of charge.
The slower 7kw 'Chargemaster' points I have found pretty reliable though. Never have any problems either starting charge, nor with speed, I always get 7kw or even 8kw sometimes. Plus they are totally free, which is great. When was the last time I got a free tank of petrol or diesel? Never!
Quick overview of other points i've used for reference in case anyone was thinking about other charging options:
SourceLondon - Very very expensive but super reliable. Never had a failure from them yet, always get 7kw.
Shell Recharge - Works well but expensive
GMEV (Manchester council EV chargers) - Worked well for me, completely free of charge as well (as long as you have a subscription to CYC or other service like Polar that's on the CYC network)
Ubitricity - Found in lamp posts on residential streets. Work well but pretty expensive (£0.24/kwh) for the speed you get.
Ecotricity - Worked OK for me, but expensive. Didn't get full speed, and only some chargers have CCS.
In general the public charging infrastructure isn't there yet, it needs way more investment.