Lexus Cheltenham - always had good servicing on all 5 Lexus I've had serviced there. Also purchased one brand new Lexus from them and prep & handover was good, no problems. Less good imo are their part-ex prices and willingness to do a deal on their approved used vehicles. The deal I got for a new IS300h was good but I've purchased 3 approved used Lexus and each time this dealership was poor in comparison with others in terms of price and part-ex values so I bought from other Lexus dealerships. One of the sales guys was a little less than honest when I was shopping round for an NX so this dealership would never be my first choice when buying an approved used Lexus. Happy with all servicing here though and it is my closest.
Lexus Derby - bought an approved used IS250 F-Sport unseen from this dealership. Asked all the right questions on phone and via email and all replies were accurate. Turned up to collect the car and it was exactly as advertised except for a slight scrape on one of the wheels. They agreed to repair this free of charge after delivery and did so with no problems. Got a good deal on this car - price and trade-in - well pleased. Too far away for me to use for regular servicing though.
Lexus Wolverhapmton - bought two approved used Lexus from here, an IS200t Sport and my current NX. Both experiences were first class. Quickly got to a deal I was happy with on both occasions and the prep and handover on both occasions was faultless. After-sales care was spot on for both cars too because I had to take each car back for minor work soon after taking delivery. NX went back for a wheel alignment adjustment. Can't remember exactly what the IS200t went back for but it was minor. The reason for going back was to ensure any work was done foc because, for example, wheel alignment is not covered under warranty for obvious reasons.
Visited Lexus Birmingham to get something checked out on one of my Lexus. Can't remember what though. I was promised a call back and never received a call. I could have chased but I got it sorted elsewhere. Can't for the life of me remember exactly what it was though.
Just wish Lexus cars went a bit longer between services though. Probably ok for owners doing 10-12k miles per year but less good for me because I do 20k miles per year which is two services.