I have Lada-112 (VAZ-21120). In operation 1 year (since December 2002), 30 thousand km.
Usually the quality in Russia is always below average level, and everybody is ready for that, so thaking it into consideration I have no big claims on my car.
The engine is good, no defects (Thanks God).
The suspension and steering control sometimes cause problems: low quality of shock-absorbers, of swinging circle of front suspension support, disbalance and deformation of brake disks, etc.
Many people have a lot of complaints for low quality of the car body details: a lot of errors of closure between body details (doors, boot lid and roof). In my car clearance between boot lid and boot frame is more than 1.5 cm.
The main common defects usually happen with acessory units: ventilation/heating system, electric window raisers, fuse/commutation box etc. These do not affect to driving itself, but makes you nervous.
The best thing in Lada - its price. With my finances I cannot buy Toyota of BMW, and I understand it and I drive Lada and feel happy.
I suppose that for export Lada has special quality control, otherwise nobody will buy it in Europe.