not as fan but as true cinema lover, according to me you can only trust the cinema of these 3 persons before release :
1. Aamir Khan
2. Christopher Nolan
3. Rajkumar Hirani.
IMO as far as Tubelight & JHMS are concerned both will be Above Average - to - Good products. Don't believe Pre-release reports. IMO we know BO better than many distributors, exhibitors & analysts.