I have converted two bikes to ebikes with a Dillenger kit. I am satisfied with both conversions. The front hub Dillenger motor has its quirks, but nothing that would prevent me from recommending the kits as an inexpensive way to convert a bicycle to an ebike. I have one on a Redline Conquest and the other kit is on my Cannondale T2 Tandem. The three quirks are as follows;
1) When you stop from a sanding stop it kind of like a top fuel dragster taking off. It takes a little getting use to, but after awhile you learn to roll with it.
2) It is hard to explain, but I feel that sometimes the hub motor works against me pedaling the bike faster. Up to about 15-16 mph no problems above that I have to up the assist level so that the hub motor will let me go faster. (I have an Orbea Gain with a rear hub motor that does not have this issue. It is assists rather than resists my efforts.)
3) Neither one of my kits displays battery usage. It is always on full bar. I have replaced everything but the batteries. Not sure why this is happening to me, but I have figured out the range by assist level and it is no issue.