Is the cosmetic bonding too transparent? (photos)

If we talk about the length of teeth then it looks fine and goes with your other teeth. About the color dentist will check the color of your teeth before choosing the bonding shade. In case your bonding is broken twice then you must visit dentist and ask for the proper treatment because if you take lightly these things then you will face problems in future.

Esthetic changes are a conversation between the artistic eye of your dentist and your desires for your smile. The result is a joint decision to reach your goals, not the goals of your dentist. If you wanted your lateral incisors longer and this length is as you desired, then that is the right length for you, as long as functionally, they are compatible with your teeth and mouth-otherwise they will not last. I think a frank discussion with your dentist that the teeth are too dark and that food is catching will facilitate a discussion about adjustments to get a matching color and opacity that looks more natural. Let him make changes to one until you reach a satisfactory result. Then repeat with the second. Remember, with that much length added, a veneer is a better long term and appropriate choice. 

In order for bonding to look lifelike, the dentist needs to use the material in an artistic way. We have different levels of opacity/translucency in the materials and they need to be used in such a way to replicate the proper tooth form as well as tooth esthetic. I personally think you're laterals are too long and the shade is off. Unfortunately, this kind of bonding can be out of the range of some dentists. Hopefully, your dentist can correct the issues for you.