I like it.
Clean interface and well laid out. Also easy to use without reading instructions.
Two suggestions.
1. In order to really be useful, we need to be able to also add text to many PDFs, so please add a text input box.
2. If possible, could you make the signature function work a little faster? It lags behind your finger/ stylus enough to confuse customers signing for the first time.
Other than these things, I really like it!
MegaHitman about
SIGNificant E-Signing Client, v1.2.3